Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Summary Collateral Information
	Description
Group 1
Pool 2994	HYBRID ARM
Pool 2995	HYBRID ARM
Group 2
Pool 2996	HYBRID ARM

General Information
Description	Total	Pool 2994	Pool 2995	Pool 2996	Group 1
Weighted Average Pass Through Rate	6.07069%	6.09596%	5.89826%	6.26793%	6.03658%
Weighted Average Mortgage Interest Rate	6.52329%	6.47096%	6.64826%	6.51793%	6.52422%
Weighted Average Remaining Term (in Months)	357.62074	357.76759	357.46953	357.29004	357.67861
Weighted Average Loan Age (in Months)	2.37926	2.23241	2.53047	2.70996	2.32139
Average Ending Scheduled Principal Balance	$729,604.91	$724,219.97	$714,087.65	$781,899.59	$721,165.03
Remaining Loan Count	2238	1346	581	311	1927
Ending Scheduled Principal Balance	$1,632,855,780.98	$974,800,085.60	$414,884,923.99	$243,170,771.39	$1,389,685,009.59

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Geographic Distribution
Total			Pool 2994			Pool 2995
State	Percent	Ending Scheduled Principal Balance	State	Percent	Ending Scheduled Principal Balance	State	Percent	Ending Scheduled Principal Balance
CA	$1,113,186,278.94	68.17%	CA	$690,291,377.19	70.81%	CA	$247,358,971.72	59.62%
NY	$86,711,078.99	5.31%	NY	$45,276,653.41	4.64%	WA	$39,118,515.90	9.43%
WA	$79,198,717.81	4.85%	WA	$31,162,808.55	3.20%	NY	$26,226,022.91	6.32%
FL	$53,798,098.87	3.29%	CT	$30,286,425.45	3.11%	IL	$13,408,217.31	3.23%
CT	$46,953,528.02	2.88%	FL	$29,804,972.02	3.06%	FL	$13,347,576.85	3.22%
OTHER	$253,008,078.35	15.49%	OTHER	$147,977,848.98	15.18%	OTHER	$75,425,619.30	18.18%

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Geographic Distribution
Pool 2996			Group 1
State	Percent	Ending Scheduled Principal Balance	State	Percent	Ending Scheduled Principal Balance
CA	$175,535,930.03	72.19%	CA	$937,650,348.91	67.47%
NY	$15,208,402.67	6.25%	NY	$71,502,676.32	5.15%
FL	$10,645,550.00	4.38%	WA	$70,281,324.45	5.06%
WA	$8,917,393.36	3.67%	FL	$43,152,548.87	3.11%
CT	$7,016,973.33	2.89%	CT	$39,936,554.69	2.87%
OTHER	$25,846,522.00	10.63%	OTHER	$227,161,556.35	16.35%

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Prepayment Information (all groups)
	1 Month	3 Month	6 Month	12 Month	Cumulative
PSA	7099.37380%	6666.93248%	6666.93248%	6666.93248%	6666.93248%
CPR	33.78251%	25.07173%	25.07173%	25.07173%	25.07173%
SMM	3.37688%	2.37663%	2.37663%	2.37663%	2.37663%

Trigger Events
	Trigger Flag
Groups I and II Optional Termination Date Has Occurred; 1=Yes, 0=No	0
Group III Optional Termination Date Has Occurred; 1=Yes, 0=No	0
Groups I and II Senior Prepayment Step-Down Has Occurred; 1=Yes, 0=No	0
Groups III Senior Prepayment Step-Down Has Occurred; 1=Yes, 0=No	0
Groups I and II Senior Credit Support Depletion Date Has Occurred; 1=Yes, 0=No	0
Groups III Senior Credit Support Depletion Date Has Occurred; 1=Yes, 0=No	0

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Comments

1. The Class L-B Subordinate Certificates provide, to the limited extent described in the Prospectus Supplement, credit support, to the Group 1 and Group 2 Certificates. The "Prospectus Supplement" is that certain Prospectus Supplement, dated September 22, 2006 to that certain Prospectus, dated January 6, 2006, pursuant to which the certain Senior Certificates were offered.

2. The Group 3-B Subordinate Certificates provide, to the limited extent described in the Prospectus Supplement, credit support, to certain Group 3 Senior Certificates. The "Prospectus Supplement" is that certain Prospectus Supplement, dated September 22, 2006 to that certain Prospectus, dated January 6, 2006, pursuant to which the Group 3 Senior Certificates were offered.

3. The MBA method of delinquency calculation is used.

Certificate Payment Summary Report
Class	CUSIP	Original Principal/Notional Balance	Beginning Principal/Notional Balance	Interest Distribution	Principal Distribution	Principal Loss	Deferred Interest	Total Distribution	Ending Principal/Notional Balance
1A1	93363NAA3	$429,891,000.00	$419,130,322.42	$2,129,168.81	$23,172,637.18	$0.00	$0.00	$25,301,805.99	$395,957,685.24
1A2	93363NAB1	$81,182,000.00	$81,182,000.00	$395,489.08	$0.00	$0.00	$0.00	$395,489.08	$81,182,000.00
1A3	93363NAC9	$170,357,000.00	$170,357,000.00	$794,426.11	$0.00	$0.00	$0.00	$794,426.11	$170,357,000.00
1A4	93363NAD7	$250,000,000.00	$246,052,170.59	$1,249,937.25	$8,501,473.80	$0.00	$0.00	$9,751,411.05	$237,550,696.79
1A5	93363NAE5	$44,912,000.00	$44,202,780.34	$224,548.73	$1,527,272.77	$0.00	$0.00	$1,751,821.50	$42,675,507.57
1X	93363NAP0	$251,541,136.00	$251,539,000.00	$87,894.99	$0.00	$0.00	$0.00	$87,894.99	$251,539,000.00
2A1	93363NAF2	$198,477,000.00	$194,983,538.32	$934,296.03	$8,433,960.10	$0.00	$0.00	$9,368,256.13	$186,549,578.22
2A2	93363NAG0	$100,151,000.00	$98,388,877.08	$493,851.30	$4,267,907.56	$0.00	$0.00	$4,761,758.86	$94,120,969.52

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Certificate Payment Summary Report (Continued)
Class	CUSIP	Original Principal/Notional Balance	Beginning Principal/Notional Balance	Interest Distribution	Principal Distribution	Principal Loss	Deferred Interest	Total Distribution	Ending Principal/Notional Balance
2A3	93363NAH8	$100,151,000.00	$98,388,877.08	$473,353.62	$4,267,907.56	$0.00	$0.00	$4,741,261.18	$94,120,969.52
2A4	93363NAJ4	$19,229,000.00	$18,890,608.31	$91,689.73	$818,277.25	$0.00	$0.00	$909,966.98	$18,072,331.06
2A4_2A	XXXXXXXXX	$9,571,000.00	$9,402,537.55	$45,053.83	$406,704.21	$0.00	$0.00	$451,758.04	$8,995,833.34
2A4_2B	XXXXXXXXX	$9,658,000.00	$9,488,070.76	$46,635.91	$411,573.04	$0.00	$0.00	$458,208.95	$9,076,497.72
3A1	93363NAK1	$132,694,000.00	$132,105,963.14	$690,025.25	$5,782,637.91	$0.00	$0.00	$6,472,663.16	$126,323,325.23
3A2	93363NAL9	$40,861,000.00	$40,861,000.00	$213,428.08	$0.00	$0.00	$0.00	$213,428.08	$40,861,000.00
3A3	93363NAM7	$57,851,000.00	$57,851,000.00	$302,171.45	$0.00	$0.00	$0.00	$302,171.45	$57,851,000.00
3A4	93363NAN5	$9,016,000.00	$8,993,089.01	$46,973.35	$225,302.12	$0.00	$0.00	$272,275.47	$8,767,786.89
2P	93363NAR6	$1,912,649.00	$1,880,396.43	$0.00	$106,726.37	$0.00	$0.00	$106,726.37	$1,773,670.06
2X	93363NAQ8	$7,559,309.00	$7,459,803.84	$35,744.89	$0.00	$0.00	$0.00	$35,744.89	$7,095,927.94
LB1	93363NAS4	$29,273,000.00	$29,272,789.61	$146,710.59	$747.80	$0.00	$0.00	$147,458.39	$29,272,041.81
LB2	93363NAT2	$13,172,000.00	$13,171,905.33	$66,015.50	$336.49	$0.00	$0.00	$66,351.99	$13,171,568.84
LB3	93363NAU9	$8,781,000.00	$8,780,936.89	$44,008.67	$224.32	$0.00	$0.00	$44,232.99	$8,780,712.57

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Certificate Payment Summary Report (Continued)
Class	CUSIP	Original Principal/Notional Balance	Beginning Principal/Notional Balance	Interest Distribution	Principal Distribution	Principal Loss	Deferred Interest	Total Distribution	Ending Principal/Notional Balance
LB4	93363NAY1	$6,586,000.00	$6,585,952.67	$33,007.75	$168.24	$0.00	$0.00	$33,175.99	$6,585,784.43
LB5	93363NAZ8	$5,854,000.00	$5,853,957.93	$29,339.11	$149.54	$0.00	$0.00	$29,488.65	$5,853,808.39
LB6	93363NBA2	$3,660,805.14	$3,660,779.67	$18,347.25	$93.40	$0.00	$0.00	$18,440.65	$3,660,686.27
3B1	93363NAV7	$3,747,000.00	$3,746,967.32	$19,571.43	$36.33	$0.00	$0.00	$19,607.76	$3,746,930.99
3B2	93363NAW5	$1,873,000.00	$1,872,983.66	$9,783.10	$18.16	$0.00	$0.00	$9,801.26	$1,872,965.50
3B3	93363NAX3	$1,248,000.00	$1,247,989.11	$6,518.59	$12.10	$0.00	$0.00	$6,530.69	$1,247,977.01
3B4	93363NBB0	$1,124,000.00	$1,123,990.20	$5,870.91	$10.90	$0.00	$0.00	$5,881.81	$1,123,979.30
3B5	93363NBC8	$874,000.00	$873,992.38	$4,565.10	$8.47	$0.00	$0.00	$4,573.57	$873,983.91
3B6	93363NBD6	$501,831.81	$501,827.43	$2,621.18	$4.87	$0.00	$0.00	$2,626.05	$501,822.56
R	93363NBE4	$100.00	$0.00	$0.04	$0.00	$0.00	$0.00	$0.04	$0.00
R_SYN	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
TFEE	XXXXXXXXX	$0.00	$0.00	$535.15	$0.00	$0.00	$0.00	$535.15	$0.00
Total*		$1,713,379,385.95	$1,689,961,694.92	$8,549,357.86	$57,105,913.24	$0.00	$0.00	$65,655,271.13	$1,632,855,781.68

*Total balances exclude notional balances.

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Total Funds Available for Distribution
PRINCIPAL BALANCE
Scheduled Principal Received or Advanced	$39,266.26
Unscheduled Principal	$2,565,224.38
Prepayments in Full	$54,501,422.73
Repurchases	$0.00
Liquidations	$0.00
Total Principal	$57,105,913.37
INTEREST
Accrued Interest at Gross Rate	$9,186,670.26
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Servicing Fees	$637,311.66
Other	$0.00
Total Interest	$8,549,357.74
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Total Funds Available for Distribution
ADDITIONAL FUNDS
Other	$0.00
Total Additional Funds	$0.00
Total Funds Available for Distribution	$65,655,271.11

Certificate Payment Report - Principal
Class	CUSIP	Beginning Principal/Notional Balance	Principal Distribution	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal Distribution	Ending Principal/Notional Balance
1A1	93363NAA3	$419,130,322.42	$23,172,637.18	$0.00	$0.00	$0.00	$0.00	$23,172,637.18	$395,957,685.24
1A2	93363NAB1	$81,182,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$81,182,000.00
1A3	93363NAC9	$170,357,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$170,357,000.00
1A4	93363NAD7	$246,052,170.59	$8,501,473.80	$0.00	$0.00	$0.00	$0.00	$8,501,473.80	$237,550,696.79
1A5	93363NAE5	$44,202,780.34	$1,527,272.77	$0.00	$0.00	$0.00	$0.00	$1,527,272.77	$42,675,507.57
1X	93363NAP0	$251,539,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$251,539,000.00
2A1	93363NAF2	$194,983,538.32	$8,433,960.10	$0.00	$0.00	$0.00	$0.00	$8,433,960.10	$186,549,578.22
2A2	93363NAG0	$98,388,877.08	$4,267,907.56	$0.00	$0.00	$0.00	$0.00	$4,267,907.56	$94,120,969.52
2A3	93363NAH8	$98,388,877.08	$4,267,907.56	$0.00	$0.00	$0.00	$0.00	$4,267,907.56	$94,120,969.52

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Certificate Payment Report - Principal (Continued)
Class	CUSIP	Beginning Principal/Notional Balance	Principal Distribution	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal Distribution	Ending Principal/Notional Balance
2A4	93363NAJ4	$18,890,608.31	$818,277.25	$0.00	$0.00	$0.00	$0.00	$818,277.25	$18,072,331.06
2A4_2A	XXXXXXXXX	$9,402,537.55	$406,704.21	$0.00	$0.00	$0.00	$0.00	$406,704.21	$8,995,833.34
2A4_2B	XXXXXXXXX	$9,488,070.76	$411,573.04	$0.00	$0.00	$0.00	$0.00	$411,573.04	$9,076,497.72
3A1	93363NAK1	$132,105,963.14	$5,782,637.91	$0.00	$0.00	$0.00	$0.00	$5,782,637.91	$126,323,325.23
3A2	93363NAL9	$40,861,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$40,861,000.00
3A3	93363NAM7	$57,851,000.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$57,851,000.00
3A4	93363NAN5	$8,993,089.01	$225,302.12	$0.00	$0.00	$0.00	$0.00	$225,302.12	$8,767,786.89
2P	93363NAR6	$1,880,396.43	$106,726.37	$0.00	$0.00	$0.00	$0.00	$106,726.37	$1,773,670.06
2X	93363NAQ8	$7,459,803.84	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$7,095,927.94
LB1	93363NAS4	$29,272,789.61	$747.80	$0.00	$0.00	$0.00	$0.00	$747.80	$29,272,041.81
LB2	93363NAT2	$13,171,905.33	$336.49	$0.00	$0.00	$0.00	$0.00	$336.49	$13,171,568.84
LB3	93363NAU9	$8,780,936.89	$224.32	$0.00	$0.00	$0.00	$0.00	$224.32	$8,780,712.57
LB4	93363NAY1	$6,585,952.67	$168.24	$0.00	$0.00	$0.00	$0.00	$168.24	$6,585,784.43

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Certificate Payment Report - Principal (Continued)
Class	CUSIP	Beginning Principal/Notional Balance	Principal Distribution	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal Distribution	Ending Principal/Notional Balance
LB5	93363NAZ8	$5,853,957.93	$149.54	$0.00	$0.00	$0.00	$0.00	$149.54	$5,853,808.39
LB6	93363NBA2	$3,660,779.67	$93.40	$0.00	$0.00	$0.00	$0.00	$93.40	$3,660,686.27
3B1	93363NAV7	$3,746,967.32	$36.33	$0.00	$0.00	$0.00	$0.00	$36.33	$3,746,930.99
3B2	93363NAW5	$1,872,983.66	$18.16	$0.00	$0.00	$0.00	$0.00	$18.16	$1,872,965.50
3B3	93363NAX3	$1,247,989.11	$12.10	$0.00	$0.00	$0.00	$0.00	$12.10	$1,247,977.01
3B4	93363NBB0	$1,123,990.20	$10.90	$0.00	$0.00	$0.00	$0.00	$10.90	$1,123,979.30
3B5	93363NBC8	$873,992.38	$8.47	$0.00	$0.00	$0.00	$0.00	$8.47	$873,983.91
3B6	93363NBD6	$501,827.43	$4.87	$0.00	$0.00	$0.00	$0.00	$4.87	$501,822.56
R	93363NBE4	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
R_SYN	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
TFEE	XXXXXXXXX	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total *		$1,689,961,694.92	$57,105,913.24	$0.00	$0.00	$0.00	$0.00	$57,105,913.24	$1,632,855,781.68

*Total balances exclude notional balances.

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Certificate Payment Report - Interest
Class	Beginning Principal/Notional Balance	Interest Rate Accrued	Interest Rate Paid	Interest Accrued	Prepayment Interest Shortfall	Relief Act Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Total Interest Distributed	Total Carryforward Amount Remaining
1A1	$419,130,322.42	6.0959627263%	6.0959627263%	$2,129,169.02	$0.00	$0.00	$0.00	($0.21)	$0.00	$0.00	$2,129,168.81	$0.00
1A2	$81,182,000.00	5.8459627263%	5.8459627263%	$395,489.12	$0.00	$0.00	$0.00	($0.04)	$0.00	$0.00	$395,489.08	$0.00
1A3	$170,357,000.00	5.5959627263%	5.5959627263%	$794,426.19	$0.00	$0.00	$0.00	($0.08)	$0.00	$0.00	$794,426.11	$0.00
1A4	$246,052,170.59	6.0959627263%	6.0959627263%	$1,249,937.38	$0.00	$0.00	$0.00	($0.13)	$0.00	$0.00	$1,249,937.25	$0.00
1A5	$44,202,780.34	6.0959627263%	6.0959627263%	$224,548.75	$0.00	$0.00	$0.00	($0.02)	$0.00	$0.00	$224,548.73	$0.00
1X	$251,539,000.00	0.4193146987%	0.4193146987%	$87,895.00	$0.00	$0.00	$0.00	($0.01)	$0.00	$0.00	$87,894.99	$0.00
2A1	$194,983,538.32	5.7500000000%	5.7500000000%	$934,296.12	$0.00	$0.00	$0.00	($0.09)	$0.00	$0.00	$934,296.03	$0.00
2A2	$98,388,877.08	6.0232582998%	6.0232582998%	$493,851.35	$0.00	$0.00	$0.00	($0.05)	$0.00	$0.00	$493,851.30	$0.00
2A3	$98,388,877.08	5.7732582998%	5.7732582998%	$473,353.67	$0.00	$0.00	$0.00	($0.05)	$0.00	$0.00	$473,353.62	$0.00
2A4	$18,890,608.31	5.8244647931%	5.8244647931%	$91,689.74	$0.00	$0.00	$0.00	($0.01)	$0.00	$0.00	$91,689.73	$0.00
2A4_2A	$9,402,537.55	5.7500000000%	5.7500000000%	$45,053.83	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$45,053.83	$0.00
2A4_2B	$9,488,070.76	5.8982582998%	5.8982582998%	$46,635.91	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$46,635.91	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Certificate Payment Report - Interest (Continued)
Class	Beginning Principal/Notional Balance	Interest Rate Accrued	Interest Rate Paid	Interest Accrued	Prepayment Interest Shortfall	Relief Act Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Total Interest Distributed	Total Carryforward Amount Remaining
3A1	$132,105,963.14	6.2679259030%	6.2679259030%	$690,025.32	$0.00	$0.00	$0.00	($0.07)	$0.00	$0.00	$690,025.25	$0.00
3A2	$40,861,000.00	6.2679259030%	6.2679259030%	$213,428.10	$0.00	$0.00	$0.00	($0.02)	$0.00	$0.00	$213,428.08	$0.00
3A3	$57,851,000.00	6.2679259030%	6.2679259030%	$302,171.48	$0.00	$0.00	$0.00	($0.03)	$0.00	$0.00	$302,171.45	$0.00
3A4	$8,993,089.01	6.2679259030%	6.2679259030%	$46,973.35	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$46,973.35	$0.00
2P	$1,880,396.43	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
2X	$7,459,803.84	5.7500000000%	5.7500000000%	$35,744.89	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$35,744.89	$0.00
LB1	$29,272,789.61	6.0142104106%	6.0142104106%	$146,710.60	$0.00	$0.00	$0.00	($0.01)	$0.00	$0.00	$146,710.59	$0.00
LB2	$13,171,905.33	6.0142104106%	6.0142104106%	$66,015.51	$0.00	$0.00	$0.00	($0.01)	$0.00	$0.00	$66,015.50	$0.00
LB3	$8,780,936.89	6.0142104106%	6.0142104106%	$44,008.67	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$44,008.67	$0.00
LB4	$6,585,952.67	6.0142104106%	6.0142104106%	$33,007.75	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$33,007.75	$0.00
LB5	$5,853,957.93	6.0142104106%	6.0142104106%	$29,339.11	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$29,339.11	$0.00
LB6	$3,660,779.67	6.0142104106%	6.0142104106%	$18,347.25	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$18,347.25	$0.00
3B1	$3,746,967.32	6.2679259030%	6.2679259030%	$19,571.43	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$19,571.43	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Certificate Payment Report - Interest (Continued)
Class	Beginning Principal/Notional Balance	Interest Rate Accrued	Interest Rate Paid	Interest Accrued	Prepayment Interest Shortfall	Relief Act Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Total Interest Distributed	Total Carryforward Amount Remaining
3B2	$1,872,983.66	6.2679259030%	6.2679259030%	$9,783.10	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$9,783.10	$0.00
3B3	$1,247,989.11	6.2679259030%	6.2679259030%	$6,518.59	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$6,518.59	$0.00
3B4	$1,123,990.20	6.2679259030%	6.2679259030%	$5,870.91	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$5,870.91	$0.00
3B5	$873,992.38	6.2679259030%	6.2679259030%	$4,565.10	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$4,565.10	$0.00
3B6	$501,827.43	6.2679259030%	6.2679259030%	$2,621.18	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$2,621.18	$0.00
R	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.04	$0.00
R_SYN	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
TFEE	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$535.15	$0.00
Total *	$1,689,961,694.92			$8,549,358.68	$0.00	$0.00	$0.00	($0.86)	$0.00	$0.00	$8,549,357.86	$0.00

*Total balances exclude notional balances.

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Principal Factors Report
Class	Original Scheduled Balance	Beginning Principal/Notional Balance	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal	Ending Principal/Notional Balance Percent	Ending Principal/Notional Balance
1A1	$429,891,000.00	974.96882331	0.00000000	0.00000000	0.00000000	0.00000000	53.90351782	0.9210653055	921.06530548
1A2	$81,182,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0000000000	1,000.00000000
1A3	$170,357,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0000000000	1,000.00000000
1A4	$250,000,000.00	984.20868236	0.00000000	0.00000000	0.00000000	0.00000000	34.00589520	0.9502027872	950.20278716
1A5	$44,912,000.00	984.20868231	0.00000000	0.00000000	0.00000000	0.00000000	34.00589531	0.9502027870	950.20278701
1X	$251,541,136.00	999.99150835	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.9999915083	999.99150835
2A1	$198,477,000.00	982.39865738	0.00000000	0.00000000	0.00000000	0.00000000	42.49338765	0.9399052697	939.90526973
2A2	$100,151,000.00	982.40533874	0.00000000	0.00000000	0.00000000	0.00000000	42.61472736	0.9397906114	939.79061138
2A3	$100,151,000.00	982.40533874	0.00000000	0.00000000	0.00000000	0.00000000	42.61472736	0.9397906114	939.79061138
2A4	$19,229,000.00	982.40201311	0.00000000	0.00000000	0.00000000	0.00000000	42.55433200	0.9398476811	939.84768111
2A4_2A	$9,571,000.00	982.39865740	0.00000000	0.00000000	0.00000000	0.00000000	42.49338732	0.9399052701	939.90527009

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Principal Factors Report (Continued)
Class	Original Scheduled Balance	Beginning Principal/Notional Balance	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal	Ending Principal/Notional Balance Percent	Ending Principal/Notional Balance
2A4_2B	$9,658,000.00	982.40533858	0.00000000	0.00000000	0.00000000	0.00000000	42.61472769	0.9397906109	939.79061089
3A1	$132,694,000.00	995.56847438	0.00000000	0.00000000	0.00000000	0.00000000	43.57874440	0.9519897300	951.98972998
3A2	$40,861,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0000000000	1,000.00000000
3A3	$57,851,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	1.0000000000	1,000.00000000
3A4	$9,016,000.00	997.45885204	0.00000000	0.00000000	0.00000000	0.00000000	24.98914374	0.9724697083	972.46970830
2P	$1,912,649.00	983.13722486	0.00000000	0.00000000	0.00000000	0.00000000	55.80029059	0.9273369343	927.33693427
2X	$7,559,309.00	986.83673865	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.9387006061	938.70060610
LB1	$29,273,000.00	999.99281283	0.00000000	0.00000000	0.00000000	0.00000000	0.02554572	0.9999672671	999.96726711
LB2	$13,172,000.00	999.99281278	0.00000000	0.00000000	0.00000000	0.00000000	0.02554585	0.9999672669	999.96726693
LB3	$8,781,000.00	999.99281289	0.00000000	0.00000000	0.00000000	0.00000000	0.02554607	0.9999672668	999.96726683
LB4	$6,586,000.00	999.99281354	0.00000000	0.00000000	0.00000000	0.00000000	0.02554510	0.9999672684	999.96726845
LB5	$5,854,000.00	999.99281346	0.00000000	0.00000000	0.00000000	0.00000000	0.02554493	0.9999672685	999.96726853
LB6	$3,660,805.14	999.99304251	0.00000000	0.00000000	0.00000000	0.00000000	0.02551351	0.9999675290	999.96752900

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Principal Factors Report (Continued)
Class	Original Scheduled Balance	Beginning Principal/Notional Balance	Principal Loss	Principal Reimbursed	Subsequent Recoveries	Deferred Interest	Total Principal	Ending Principal/Notional Balance Percent	Ending Principal/Notional Balance
3B1	$3,747,000.00	999.99127836	0.00000000	0.00000000	0.00000000	0.00000000	0.00969576	0.9999815826	999.98158260
3B2	$1,873,000.00	999.99127603	0.00000000	0.00000000	0.00000000	0.00000000	0.00969568	0.9999815804	999.98158035
3B3	$1,248,000.00	999.99127404	0.00000000	0.00000000	0.00000000	0.00000000	0.00969551	0.9999815785	999.98157853
3B4	$1,124,000.00	999.99128114	0.00000000	0.00000000	0.00000000	0.00000000	0.00969751	0.9999815836	999.98158363
3B5	$874,000.00	999.99128146	0.00000000	0.00000000	0.00000000	0.00000000	0.00969108	0.9999815904	999.98159039
3B6	$501,831.81	999.99127198	0.00000000	0.00000000	0.00000000	0.00000000	0.00970445	0.9999815675	999.98156753
R	$100.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
R_SYN	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
TFEE	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Interest Factors Report
Class	Original Balance	Interest Rate Accrued	Interest Rate Paid	Current Month Interest Accrued	Prepayment Interest Shortfall	Relief Act Interest Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Deferred Interest	Total Interest Distribution	Total Carryforward Amount Remaining
1A1	$429,891,000.00	6.0959627263%	6.0959627263%	4.95281134	0.00000000	0.00000000	0.00000000	-0.00000049	0.00000000	0.00000000	0.00000000	4.95281085	0.00000000
1A2	$81,182,000.00	5.8459627263%	5.8459627263%	4.87163558	0.00000000	0.00000000	0.00000000	-0.00000049	0.00000000	0.00000000	0.00000000	4.87163509	0.00000000
1A3	$170,357,000.00	5.5959627263%	5.5959627263%	4.66330230	0.00000000	0.00000000	0.00000000	-0.00000047	0.00000000	0.00000000	0.00000000	4.66330183	0.00000000
1A4	$250,000,000.00	6.0959627263%	6.0959627263%	4.99974952	0.00000000	0.00000000	0.00000000	-0.00000052	0.00000000	0.00000000	0.00000000	4.99974900	0.00000000
1A5	$44,912,000.00	6.0959627263%	6.0959627263%	4.99974951	0.00000000	0.00000000	0.00000000	-0.00000045	0.00000000	0.00000000	0.00000000	4.99974906	0.00000000
1X	$251,541,136.00	0.4193146987%	0.4193146987%	0.34942595	0.00000000	0.00000000	0.00000000	-0.00000004	0.00000000	0.00000000	0.00000000	0.34942591	0.00000000
2A1	$198,477,000.00	5.7500000000%	5.7500000000%	4.70732689	0.00000000	0.00000000	0.00000000	-0.00000045	0.00000000	0.00000000	0.00000000	4.70732644	0.00000000
2A2	$100,151,000.00	6.0232582998%	6.0232582998%	4.93106759	0.00000000	0.00000000	0.00000000	-0.00000050	0.00000000	0.00000000	0.00000000	4.93106709	0.00000000
2A3	$100,151,000.00	5.7732582998%	5.7732582998%	4.72639984	0.00000000	0.00000000	0.00000000	-0.00000050	0.00000000	0.00000000	0.00000000	4.72639934	0.00000000
2A4	$19,229,000.00	5.8244647931%	5.8244647931%	4.76830516	0.00000000	0.00000000	0.00000000	-0.00000052	0.00000000	0.00000000	0.00000000	4.76830464	0.00000000
2A4_2A	$9,571,000.00	5.7500000000%	5.7500000000%	4.70732734	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.70732734	0.00000000

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Interest Factors Report (Continued)
Class	Original Balance	Interest Rate Accrued	Interest Rate Paid	Current Month Interest Accrued	Prepayment Interest Shortfall	Relief Act Interest Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Deferred Interest	Total Interest Distribution	Total Carryforward Amount Remaining
2A4_2B	$9,658,000.00	5.8982582998%	5.8982582998%	4.82873369	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.82873369	0.00000000
3A1	$132,694,000.00	6.2679259030%	6.2679259030%	5.20012450	0.00000000	0.00000000	0.00000000	-0.00000053	0.00000000	0.00000000	0.00000000	5.20012397	0.00000000
3A2	$40,861,000.00	6.2679259030%	6.2679259030%	5.22327158	0.00000000	0.00000000	0.00000000	-0.00000049	0.00000000	0.00000000	0.00000000	5.22327109	0.00000000
3A3	$57,851,000.00	6.2679259030%	6.2679259030%	5.22327151	0.00000000	0.00000000	0.00000000	-0.00000052	0.00000000	0.00000000	0.00000000	5.22327099	0.00000000
3A4	$9,016,000.00	6.2679259030%	6.2679259030%	5.20999889	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.20999889	0.00000000
2P	$1,912,649.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
2X	$7,559,309.00	5.7500000000%	5.7500000000%	4.72859226	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.72859226	0.00000000
LB1	$29,273,000.00	6.0142104106%	6.0142104106%	5.01180610	0.00000000	0.00000000	0.00000000	-0.00000034	0.00000000	0.00000000	0.00000000	5.01180576	0.00000000
LB2	$13,172,000.00	6.0142104106%	6.0142104106%	5.01180610	0.00000000	0.00000000	0.00000000	-0.00000076	0.00000000	0.00000000	0.00000000	5.01180534	0.00000000
LB3	$8,781,000.00	6.0142104106%	6.0142104106%	5.01180617	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.01180617	0.00000000
LB4	$6,586,000.00	6.0142104106%	6.0142104106%	5.01180534	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.01180534	0.00000000
LB5	$5,854,000.00	6.0142104106%	6.0142104106%	5.01180560	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.01180560	0.00000000
LB6	$3,660,805.14	6.0142104106%	6.0142104106%	5.01180732	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.01180732	0.00000000

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Interest Factors Report (Continued)
Class	Original Balance	Interest Rate Accrued	Interest Rate Paid	Current Month Interest Accrued	Prepayment Interest Shortfall	Relief Act Interest Shortfall	Other Interest Shortfall	Unscheduled Interest	Interest Reimbursed	Carryforward Amount Paid	Deferred Interest	Total Interest Distribution	Total Carryforward Amount Remaining
3B1	$3,747,000.00	6.2679259030%	6.2679259030%	5.22322658	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.22322658	0.00000000
3B2	$1,873,000.00	6.2679259030%	6.2679259030%	5.22322477	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.22322477	0.00000000
3B3	$1,248,000.00	6.2679259030%	6.2679259030%	5.22322917	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.22322917	0.00000000
3B4	$1,124,000.00	6.2679259030%	6.2679259030%	5.22322954	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.22322954	0.00000000
3B5	$874,000.00	6.2679259030%	6.2679259030%	5.22322654	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.22322654	0.00000000
3B6	$501,831.81	6.2679259030%	6.2679259030%	5.22322409	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.22322409	0.00000000
R	$100.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.40000000	0.00000000
R_SYN	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
TFEE	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Pool 2994
LOAN COUNT
Original Loan Count	1391
Beginning Loan Count	1379
Loans Added	0
Loans Prepaid-in-full	33
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	1346
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$1,023,420,304.26
Beginning Scheduled Principal Balance	$1,008,002,431.45
Scheduled Principal Received or Advanced	$20,599.85
Unscheduled Principal	$1,271,670.87
Prepayments-in-full	$31,910,075.13

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Pool 2994 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$974,800,085.60
INTEREST
Accrued Interest at Gross Rate	$5,435,622.86
Unscheduled Interest	($0.63)
Uncollected Interest	($32,960.21)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Pool 2994 (Continued)
FEES
Servicing Fees	$315,001.98
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$0.00
Other	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Pool 2995
LOAN COUNT
Original Loan Count	611
Beginning Loan Count	602
Loans Added	0
Loans Prepaid-in-full	21
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	581
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$440,169,250.14
Beginning Scheduled Principal Balance	$432,780,460.65
Scheduled Principal Received or Advanced	$16,250.60
Unscheduled Principal	$522,271.55
Prepayments-in-full	$17,357,014.51

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Pool 2995 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$414,884,923.99
INTEREST
Accrued Interest at Gross Rate	$2,397,556.15
Unscheduled Interest	($0.16)
Uncollected Interest	($8,338.58)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Pool 2995 (Continued)
FEES
Servicing Fees	$270,347.03
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$0.00
Other	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Pool 2996
LOAN COUNT
Original Loan Count	319
Beginning Loan Count	319
Loans Added	0
Loans Prepaid-in-full	8
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	311
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$249,789,831.81
Beginning Scheduled Principal Balance	$249,178,802.25
Scheduled Principal Received or Advanced	$2,415.81
Unscheduled Principal	$771,281.96
Prepayments-in-full	$5,234,333.09

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Pool 2996 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$243,170,771.39
INTEREST
Accrued Interest at Gross Rate	$1,353,491.25
Unscheduled Interest	($0.07)
Uncollected Interest	($6,963.54)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Pool 2996 (Continued)
FEES
Servicing Fees	$51,962.65
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$0.00
Other	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Group 1
LOAN COUNT
Original Loan Count	2002
Beginning Loan Count	1981
Loans Added	0
Loans Prepaid-in-full	54
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	1927
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$1,463,589,554.40
Beginning Scheduled Principal Balance	$1,440,782,892.10
Scheduled Principal Received or Advanced	$36,850.45
Unscheduled Principal	$1,793,942.42
Prepayments-in-full	$49,267,089.64

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Group 1 (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$1,389,685,009.59
INTEREST
Accrued Interest at Gross Rate	$7,833,179.01
Unscheduled Interest	($0.79)
Uncollected Interest	($41,298.79)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Group 1 (Continued)
FEES
Servicing Fees	$585,349.01
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$0.00
Other	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Total
LOAN COUNT
Original Loan Count	2321
Beginning Loan Count	2300
Loans Added	0
Loans Prepaid-in-full	62
Loans Liquidated-in-full	0
Loans Repurchased	0
Ending Loan Count	2238
PRINCIPAL BALANCE
Original Scheduled Principal Balance	$1,713,379,386.21
Beginning Scheduled Principal Balance	$1,689,961,694.35
Scheduled Principal Received or Advanced	$39,266.26
Unscheduled Principal	$2,565,224.38
Prepayments-in-full	$54,501,422.73

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Total (Continued)
PRINCIPAL BALANCE
Liquidations-in-full	$0.00
Repurchases	$0.00
Principal Losses	$0.00
Ending Scheduled Principal Balance	$1,632,855,780.98
INTEREST
Accrued Interest at Gross Rate	$9,186,670.26
Unscheduled Interest	($0.86)
Uncollected Interest	($48,262.33)
Relief Act Shortfall	$0.00
Prepayment Interest Shortfall	$0.00
Other Interest Shortfall	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Collateral Report Total (Continued)
FEES
Servicing Fees	$637,311.66
Other Fees	$0.00
ADDITIONAL FUNDS
Excess Liquidation Proceeds	$0.00
Subsequent Recoveries	$0.00
Prepayment Penalties	$0.00
Other	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Delinquency Information by Group*
Group ID	1 Month Count	Scheduled Ending Balance	2 Months Count	Scheduled Ending Balance	3 Months Count	Scheduled Ending Balance	4+ Months Count	Scheduled Ending Balance
Pool 2994	24	$22,284,787.77	3	$1,933,800.34	0	$0.00	0	$0.00
Pool 2995	4	$2,686,000.00	1	$452,000.00	0	$0.00	0	$0.00
Pool 2996	4	$4,836,800.00	1	$482,707.00	0	$0.00	0	$0.00
Group 1	28	$24,970,787.77	4	$2,385,800.34	0	$0.00	0	$0.00
Aggregate	32	$29,807,587.77	5	$2,868,507.34	0	$0.00	0	$0.00

* Does not include mortgage loans in foreclosure or REO.

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Foreclosure, REO, and Bankruptcy by Group**
Group ID	Foreclosure Count	Scheduled Ending Balance	REO Count	Scheduled Ending Balance	Bankruptcy Count	Scheduled Ending Balance
Pool 2994	0	$0.00	0	$0.00	0	$0.00
Pool 2995	0	$0.00	0	$0.00	0	$0.00
Pool 2996	0	$0.00	0	$0.00	0	$0.00
Group 1	0	$0.00	0	$0.00	0	$0.00
Aggregate	0	$0.00	0	$0.00	0	$0.00

** Loans in Bankruptcy will also be reflected under their applicable delinquency or foreclosure status.

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Aggregate Loss Amount by Group
Group ID	Count	Loss Amount
Pool 2994	0	$0.00
Pool 2995	0	$0.00
Pool 2996	0	$0.00
Group 1	0	$0.00
Aggregate	0	$0.00

Servicer Advances by Group
Group	Count	Total
Pool 2994	1127	$4,241,642.66
Pool 2995	498	$1,707,215.45
Pool 2996	242	$978,592.05
Group 1	1625	$5,948,858.11
Aggregate	1867	$6,927,450.16

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Stop Advances Loans
Group	Count	Loan Balance	Total Scheduled P&I
Pool 2994	0	$0.00	$0.00
Pool 2995	0	$0.00	$0.00
Pool 2996	0	$0.00	$0.00
Group 1	0	$0.00	$0.00
Aggregate	0	$0.00	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Delinquency Roll Rates-Aggregate***
Current Value	Current		1 Month		2 Months		3 Months
Prior Value	Count	Balance	Count	Balance	Count	Balance	Count	Balance
Current	2193	$1,594,412,973.18	28	$27,097,587.77	0	$0.00	0	$0.00
Delq 1 Month	8	$5,766,712.69	4	$2,710,000.00	5	$2,868,507.34	0	$0.00
Delq 2 Month	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Delq 3 Month	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Delq 4 Month	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Foreclosure	0	$0.00	0	$0.00	0	$0.00	0	$0.00

Current Value	4+ Months		Foreclosure		REO
Prior Value	Count	Balance	Count	Balance	Count	Balance
Current	0	$0.00	0	$0.00	0	$0.00
Delq 1 Month	0	$0.00	0	$0.00	0	$0.00
Delq 2 Month	0	$0.00	0	$0.00	0	$0.00
Delq 3 Month	0	$0.00	0	$0.00	0	$0.00
Delq 4 Month	0	$0.00	0	$0.00	0	$0.00
Foreclosure	0	$0.00	0	$0.00	0	$0.00

*** To use this chart, locate along the Current Value row the desired delinquency status as of the immediately preceding due date (e.g. Current, 1 Month delinquent, etc.). Use the left hand column labeled Prior Value to see the prior month's value. Follow the selected Current Value column to the desired Prior Value row.

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Credit Enhancement
Type	Original Balance	Beginning Balance	Reduction	Increase	Ending Balance
Over Collateralization	$0.00	$0.00	$0.00	$0.00	$0.00
Reserve Account	$0.00	$0.00	$0.00	$0.00	$0.00
Other	$0.00	$0.00	$0.00	$0.00	$0.00

Insurance
Insurance Type	Original Balance	Claims Paid	Coverage Remaining
Pool Insurance	$0.00	$0.00	$0.00
Other	$0.00	$0.00	$0.00

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Subordinate Class Certificate Balances
The Class Principal Balances of each Class of the Class 3B1,3B2,3B3,3B4,3B5,3B6 Certificates immediately after the principal and interest distribution on 11/27/2006 are as follows:
Class	Ending Principal Balance	Percentage of Aggregate Certificate Principal Balance on Closing Date	Percentage of Aggregate Certificate Ending Principal Balance
3B1	$3,746,930.99	0.22%	0.23%
3B2	$1,872,965.50	0.11%	0.11%
3B3	$1,247,977.01	0.07%	0.08%
3B4	$1,123,979.30	0.07%	0.07%
3B5	$873,983.91	0.05%	0.05%
3B6	$501,822.56	0.03%	0.03%
Total	$9,367,659.27	0.55%	0.57%

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Subordinate Class Certificate Balances
The Class Principal Balances of each Class of the Class LB1,LB2,LB3,LB4,LB5,LB6 Certificates immediately after the principal and interest distribution on 11/27/2006 are as follows:
Class	Ending Principal Balance	Percentage of Aggregate Certificate Principal Balance on Closing Date	Percentage of Aggregate Certificate Ending Principal Balance
LB1	$29,272,041.81	1.71%	1.79%
LB2	$13,171,568.84	0.77%	0.81%
LB3	$8,780,712.57	0.51%	0.54%
LB4	$6,585,784.43	0.38%	0.40%
LB5	$5,853,808.39	0.34%	0.36%
LB6	$3,660,686.27	0.21%	0.22%
Total	$67,324,602.31	3.93%	4.12%

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Glossary of Terms
TERM	DEFINITION
Average Ending Scheduled Principal Balance	Average scheduled principal balance of all mortgage loans as of the immediately preceding due date.
Compensating Interest	Interest paid by the servicer or master servicer in respect of Prepayment Interest Shortfall, subject to specified caps.
CPR (Constant Prepayment Rate)	The annualized, compounded single month mortality rate.
Current Interest Accrued	The interest accrued for the current month's distribution.
Deferred Interest	When a scheduled monthly payment is less than required to satisfy the note rate, the unpaid interest is deferred by adding it to the loan balance and the certificate balances.
Excess Liquidation Proceeds	Funds received at the time of liquidation in excess of the amount needed to satisfy the outstanding scheduled principal balance and related expenses.
Interest Rate Accrued	The rate at which interest is accrued for the current month's distribution.
Interest Rate Paid	The rate at which interest is paid for the current month's distribution.
Uncollected Interest	Interest not collected on delinquent loans for which scheduled payments are no longer being advanced, interest uncollected on prepayments and interest uncollected on liquidations.
Other Interest Shortfall	Any interest shortfall other than Uncompensated Interest Shortfall, Deferred Interest or Interest Uncollected on Non-Earning Assets.
Over Collateralization	Any excess of the aggregate principal balance of the mortgage loans over the aggregate principal balance of the certificates.
Prefunding Amount	The amount of cash being held for future loan purchases.

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Glossary of Terms (Continued)
TERM	DEFINITION
Prepayment Interest Shortfall	Any shortfall in collections of interest on mortgage loans resulting from prepayments in full or partial prepayments.
Principal Loss	The amount of principal reduction due to a loss realized on the mortgage loans.
Principal Reimbursed	The amount of principal passed through as a reimbursement.
PSA (Prepayment Speed Assumption)	A prepayment model that in its base case (stated as 100% PSA), assumes that prepayments start in month one at an annual CPR of 0.2%, rising linearly to 6.0% CPR in month 30, and then remain flat at 6.0% CPR thereafter.
Relief Act Shortfall	Interest shortfall resulting from application of the Servicemembers Civil Relief Act.
REO (Real Estate Owned)	Property acquired by the trust through foreclosure or deed-in-lieu of foreclosure on a defaulted loan.
Reserve Account	Funded or non-funded accounts set up at either the property or portfolio level in in anticipation of periodic or non-periodic capital expenditures or cash needs.
Servicer Advances	Scheduled principal and interest advances made by the servicer or master servicer for delinquent mortgage loans.
Servicing Fees	The monthly fee paid to the servicer to perform primary servicing function for the master servicer with respect to the mortgage loans and if applicable the fee charged by the master servicer for supervising the mortgage loan servicing.
SMM (Single Month Mortality)	In any given month, the SMM measures the percentage of the beginning pool balance that was paid back earlier than scheduled through payoffs.
Stop Advance	The amount of principal and interest on delinquent mortgage loans for which scheduled payments are no longer being advanced.
Subsequent Recoveries	The amount of funds recovered on mortgage loans that were previously liquidated at a loss.
Trigger Event	An event that may require a change in payment priority.

Series: WAMU 2006-AR12	Washington Mutual
Issue Date: 09/26/2006
Record Date: 10/31/2006
Distribution Date: 11/27/2006

Glossary of Terms (Continued)
TERM	DEFINITION
Unscheduled Interest	Interested collected in addition to the scheduled interest payment.
Unscheduled Principal	Payments of principal which were received with respect to any mortgage loan during the prior period, other than monthly scheduled principal, prepayments in full, repurchases, liquidation principal and subsequent recoveries.
Weighted Average Loan Age	For any distribution date, the weighted average of the loan age on the mortgage loans as of the immediately preceding due date.
Weighted Average Mortgage Interest Rate	For any distribution date, the weighted average of the mortgage interest rates on the mortgage loans as of the second preceding due date (after giving effect to the payments due on the mortgage loans on that due date).
Weighted Average Pass Through Rate	For any distribution date, the weighted average of the pass-through rates on the mortgage loans as of the second preceding due date (after giving effect to the payments due on the mortgage loans on that due date).
Weighted Average Remaining Term	For any distribution date, the weighted average of the maturity on the mortgage loans as of the immediately preceding due date.
MBA Delinquency Calculation	In this calculation, a loan increases its delinquency status if a monthly payment is not received by the end of the day immediately preceding the loan's next due date.
OTS Delinquency Calculation	In this calculation, a loan increases its delinquency status if a monthly payment is not received by the loan's due date in the following month.

WaMu Mortgage Pass-Through Certificates, Series 2006-AR12 10-D