UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): ~~October~~December 2527, 2005 (Date of earliest event reported) Greenwich Capital Acceptance, Inc., (as depositor, under the Trust Agreement, dated as October 1, 2003, providing for the issuance of Washington Mutual Mortgage Trust Mortgage Pass-Through Certificates, Series 2003-R1) (Exact name of Registrant as specified in its Charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-108195-05 06-1199884 (Commission File Number) (I.R.S. Employer Identification No.) 600 Steamboat Road Greenwich, Connecticut 06830 (Address of principal executive offices) (Zip Code) Registrant's Telephone Number, Including Area Code: (203) 662-2700 (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR 240.14a-12(b)) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Item 8.01 Other Events. This current report on Form 8-K relates to the monthly distribution reported to the holders of Washington Mutual Mortgage Trust Mortgage Pass-Through Certificates, Series 2003-R1, which was made on October 1, 2003 Item 9.01 Financial Statements and Exhibits. (c) Exhibits Exhibit No. Description 99.1 Monthly Remittance Statement to the Certificateholders dated as of ~~October~~December 2527, 2005. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on behalf of the Registrant by the undersigned thereunto duly authorized. DEUTSCHE BANK NATIONAL TRUST COMPANY, IN ITS CAPACITY AS TRUSTEE UNDER THE TRUST AGREEMENT ON BEHALF OF GREENWICH CAPITAL ACCEPTANCE, INC., REGISTRANT Date: ~~Oct~~Dec 2829, 2005 By: /s/ Katherine M. Wannenmacher Katherine M. Wannenmacher Vice President EXHIBIT INDEX DOCUMENT 99.1 Monthly Remittance Statement to the Certificateholders dated as of ~~October~~December 2527, 2005.

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

October 25, 2005 Distribution

December 27, 2005 Distribution

Contents

TABLE OF CONTENTS

Page

Contents

Certificate Payment Report

Collection Account Report

Credit Enhancement Report

Collateral Report

Delinquency Report

REO Report

Prepayment Report

Realized Loss Report

10.

Realized Loss Detail Report

11.

Additional Certificate Report

Total Number of Pages

CONTACTS

Administrator: Amy Stoddard

Direct Phone Number: (714)247-6255

Address: Deutsche Bank

1761 E. St. Andrew Place, Santa Ana, CA 92705

Web Site: https://www.tss.db.com/invr

Factor Information: (800) 735-7777

Main Phone Number: (714) 247-6000

ISSUANCE INFORMATION

Seller:

Washington Mutual Bank

Cut-Off Date: March 1, 2000

Certificate Insurer(s):

Closing Date: March 31, 2000

First Payment Date: April 25, 2000

Servicer(s):

Washington Mutual Master Servicer

Distribution Date: October 25, 2005

Distribution Date: December 27, 2005

Underwriter(s):

Lehman Brothers Underwriter

Record Date: ~~October~~December 2423, 2005

September 30, 2005

November 30, 2005

Page 1 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Lower Tier REMIC Series 2000-1

Certificate Payment Report for October 25, 2005 Distribution

Certificate Payment Report for December 27, 2005 Distribution

Distribution in Dollars - Current Period

Prior

Current

Class

Original

Principal

Total

Realized

Deferred

Principal

Class

Type

Face Value

Balance

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

(6)

(7)=(1)-(3)-(5)+(6)

LT-A1

4,799,976,000.00

LT-A2

1,599,992,000.00

~~813~~781,~~978~~551,~~007~~524.5891

3,~~279~~264,~~198~~582.5541

1612,~~098~~939,~~824~~983.6741

1916,~~378~~204,~~023~~565.2282

~~797~~768,~~879~~611,~~182~~541.9150

LT-M1

100,523,000.00

2625,~~834~~765,~~439~~434.8189

~~108~~107,~~105~~623.4560

~~530~~426,~~730~~592.4886

~~638~~534,~~835~~216.9346

2625,~~303~~338,~~709~~842.3303

LT-M2

83,769,000.00

2221,~~362~~471,~~033~~195.1874

9089,~~087~~686.8733

~~442~~355,~~275~~494.4005

~~532~~445,~~363~~180.2738

21,~~919~~115,~~757~~701.7769

LT-M3

33,508,000.00

8,~~944~~588,~~813~~478.2730

3635,~~035~~874.1553

~~176~~142,~~910~~197.1662

~~212~~178,~~945~~072.3115

8,~~767~~446,~~903~~280.1168

LT-B1

40,209,000.00

21,~~334~~443,~~745~~908.4703

96,~~405~~031.7728

~~442~~355,~~275~~494.4005

~~451~~361,~~681~~525.1733

1,~~892~~088,~~470~~413.0698

LT-B2

23,455,000.00

142,848.74

~~575~~596.4869

142,848.74

LT-B3

20,104,869.34

19,884,438.97

8083,~~106~~058.6236

19,884,438.97

LT-R

Total

6,701,536,869.34

~~894~~858,~~481~~847,~~327~~829.0157

3,~~603~~587,~~514~~453.8920

1714,~~691~~219,~~016~~761.1299

2117,~~294~~807,~~531~~215.0119

~~876~~844,~~790~~628,~~310~~067.8958

Interest Accrual Detail

Current Period Factor Information per $1,000 of Original Face

Orig. Principal

Prior

Current

Period

(with Notional)

Principal

Total

Principal

Class

Starting

Ending

Method

Cusip

Balance

Interest

Principal

Distribution

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

LT-A1

F-30/360

4,799,976,000.00

LT-A2

F-30/360

1,599,992,000.00

~~508~~488.~~738798~~472145

2.~~049509~~040374

108.~~061816~~087530

1210.~~111325~~127904

~~498~~480.~~676983~~384615

LT-M1

F-30/360

100,523,000.00

~~266~~256.~~948259~~313828

1.~~075430~~070637

54.~~279692~~243734

65.~~355122~~314370

~~261~~252.~~668567~~070094

LT-M2

F-30/360

83,769,000.00

~~266~~256.~~948790~~314338

1.~~075432~~070639

54.~~279703~~243742

65.~~355135~~314381

~~261~~252.~~669087~~070595

LT-M3

F-30/360

33,508,000.00

~~266~~256.~~945603~~311278

1.~~075419~~070626

54.~~279640~~243692

65.~~355059~~314317

~~261~~252.~~665964~~067586

LT-B1

F-30/360

40,209,000.00

5835.~~065246~~910071

0.~~233922~~149998

108.~~999413~~841156

118.~~233335~~991154

4727.~~065833~~068914

LT-B2

F-30/360

23,455,000.00

6.090332

0.~~024535~~025440

6.090332

LT-B3

F-30/360

20,104,869.34

989.035971

34.~~984439~~131256

989.035971

LT-R

F-30/360

Page 2 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Lower Tier REMIC Series 2000-1

Certificate Payment Report for October 25, 2005 Distribution

Certificate Payment Report for December 27, 2005 Distribution

Distribution in Dollars - to Date

Current

Original

Unscheduled

Scheduled

Total

Realized

Deferred

Principal

Class

Face Value

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)

(5)=(3)+(4)

(6)=(2)+(5)

(7)

(8)

(9)=(1)-(5)-(7)+(8)

LT-A1

4,799,976,000.00

535,861,077.70

4,620,338,847.23

179,637,152.77

4,799,976,000.00

5,335,837,077.70

LT-A2

1,599,992,000.00

~~421~~428,~~628~~164,~~983~~330.2756

~~822~~851,~~269~~536,~~150~~791.5798

1,~~243~~279,~~898~~701,~~133~~122.8454

20,156,333.48

~~797~~768,~~879~~611,~~182~~541.9150

LT-M1

100,523,000.00

24,~~001~~217,~~802~~253.9293

7475,~~219~~184,~~290~~157.6797

9899,~~221~~401,~~093~~411.5990

2625,~~303~~338,~~709~~842.3303

LT-M2

83,769,000.00

1920,~~901~~080,~~152~~695.7930

6162,~~849~~653,~~242~~298.2331

8182,~~750~~733,~~395~~993.0261

21,~~919~~115,~~757~~701.7769

LT-M3

33,508,000.00

78,~~960~~032,~~539~~356.08

2425,~~740~~061,~~096~~719.8932

3233,~~700~~094,~~635~~075.9740

8,~~767~~446,~~903~~280.1168

LT-B1

40,209,000.00

9,~~134~~148,~~916~~705.4255

3839,~~316~~120,~~529~~586.9402

4748,~~451~~269,~~446~~291.3657

1,~~892~~088,~~470~~413.0698

LT-B2

23,455,000.00

4,~~694~~695,~~687~~870.7704

23,312,151.26

28,~~006~~008,~~839~~021.0330

142,848.74

LT-B3

20,104,869.34

6,~~070~~235,~~525~~096.4152

220,430.37

19,884,438.97

LT-R

Total

6,701,536,869.34

1,~~029~~036,~~253~~435,~~685~~385.3668

4,620,338,847.23

1,~~224~~256,~~343~~505,~~614~~857.3364

5,876,844,~~682,461~~704.5687

6,~~873~~913,~~936~~280,~~146~~090.9255

220,430.37

20,156,333.48

~~876~~844,~~790~~628,~~310~~067.8958

Interest Detail

Pass-

Prior Principal

Non-

Prior

Unscheduled

Paid or

Current

Through

(with Notional)

Accrued

Supported

Unpaid

Interest

Optimal

Deferred

Unpaid

Class

Rate

Balance

Interest

Interest SF

Interest

Adjustments

Interest

(1)

(2)

(3)

(4)

(5)=(1)-(2)+(3)+(4)

(6)

(7)=(5)-(6)

LT-A1

45.~~83433~~01246%

LT-A2

45.~~83433~~01246%

~~813~~781,~~978~~551,~~007~~524.5891

3,~~279~~264,~~198~~582.5541

LT-M1

45.~~83433~~01246%

2625,~~834~~765,~~439~~434.8189

~~108~~107,~~105~~623.4560

LT-M2

45.~~83433~~01246%

2221,~~362~~471,~~033~~195.1874

9089,~~087~~686.8733

LT-M3

45.~~83433~~01246%

8,~~944~~588,~~813~~478.2730

3635,~~035~~874.1553

LT-B1

45.~~83433~~01246%

21,~~334~~443,~~745~~908.4703

96,~~405~~031.7728

LT-B2

45.~~83433~~01246%

142,848.74

~~575~~596.4869

LT-B3

45.~~83433~~01246%

19,884,438.97

8083,~~106~~058.6236

LT-R

Total

~~894~~858,~~481~~847,~~327~~829.0157

3,~~603~~587,~~514~~453.8920

Page 3 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Upper Tier REMIC Series 2000-1

Certificate Payment Report for October 25, 2005 Distribution

Certificate Payment Report for December 27, 2005 Distribution

Distribution in Dollars - Current Period

Prior

Current

Class

Original

Principal

Total

Realized

Deferred

Principal

Class

Type

Face Value

Balance

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

(6)

(7)=(1)-(3)-(5)+(6)

STEP, FLT

4,799,976,000.00

CSTR

1,599,992,000.00

~~813~~781,~~978~~551,~~007~~524.5891

3,~~292~~246,~~271~~437.1016

1612,~~098~~939,~~824~~983.6741

1916,~~391~~186,~~095~~420.7757

~~797~~768,~~879~~611,~~182~~541.9150

MEZ, STEP

100,523,000.00

2625,~~834~~765,~~439~~434.8189

91105,~~438~~208.3586

~~530~~426,~~730~~592.4886

~~622~~531,~~168~~801.8372

2625,~~303~~338,~~709~~842.3303

MEZ, STEP

83,769,000.00

2221,~~362~~471,~~033~~195.1874

8395,~~404~~308.1725

~~442~~355,~~275~~494.4005

~~525~~450,~~679~~802.5730

21,~~919~~115,~~757~~701.7769

MEZ, STEP

33,508,000.00

8,~~944~~588,~~813~~478.2730

4045,~~206~~375.9479

~~176~~142,~~910~~197.1662

~~217~~187,~~117~~573.1041

8,~~767~~446,~~903~~280.1168

SUB, STEP

40,209,000.00

21,~~334~~443,~~745~~908.4703

1410,~~726~~516.4046

~~442~~355,~~275~~494.4005

~~457~~366,~~001~~010.8051

1,~~892~~088,~~470~~413.0698

SUB, STEP

23,455,000.00

142,848.74

1,~~361~~548.3132

142,848.74

SUB, CSTR

20,104,869.34

19,884,438.97

8083,~~106~~058.6236

19,884,438.97

UT-R

Total

6,701,536,869.34

~~894~~858,~~481~~847,~~327~~829.0157

3,~~603~~587,~~514~~453.8920

1714,~~691~~219,~~016~~761.1299

2117,~~294~~807,~~531~~215.0119

~~876~~844,~~790~~628,~~310~~067.8958

Interest Accrual Detail

Current Period Factor Information per $1,000 of Original Face

Orig. Principal

Prior

Current

Period

(with Notional)

Principal

Total

Principal

Class

Starting

Ending

Method

Cusip

Balance

Interest

Principal

Distribution

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

0911/2625/05

1012/2426/05

A-Act/360

863572L68

4,799,976,000.00

F-30/360

863572L76

1,599,992,000.00

~~508~~488.~~738798~~472145

2.~~057680~~029033

108.~~061816~~087530

1210.~~119495~~116563

~~498~~480.~~676983~~384615

0911/2625/05

1012/2426/05

A-Act/360

863572L84

100,523,000.00

~~266~~256.~~948259~~313828

01.~~909626~~046615

54.~~279692~~243734

65.~~189318~~290349

~~261~~252.~~668567~~070094

0911/2625/05

1012/2426/05

A-Act/360

863572L92

83,769,000.00

~~266~~256.~~948790~~314338

01.~~995645~~137751

54.~~279703~~243742

65.~~275347~~381493

~~261~~252.~~669087~~070595

0911/2625/05

1012/2426/05

A-Act/360

863572M26

33,508,000.00

~~266~~256.~~945603~~311278

1.~~199921~~354178

54.~~279640~~243692

65.~~479560~~597869

~~261~~252.~~665964~~067586

0911/2625/05

1012/2426/05

A-Act/360

863572M34

40,209,000.00

5835.~~065246~~910071

0.~~366246~~261545

108.~~999413~~841156

119.~~365660~~102701

4727.~~065833~~068914

0911/2625/05

1012/2426/05

A-Act/360

863572M42

23,455,000.00

6.090332

0.~~058039~~066012

6.090332

F-30/360

863572M59

20,104,869.34

989.035971

34.~~984439~~131256

989.035971

UT-R

F-30/360

863572M67

Page 4 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Upper Tier REMIC Series 2000-1

Certificate Payment Report for October 25, 2005 Distribution

Certificate Payment Report for December 27, 2005 Distribution

Distribution in Dollars - to Date

Current

Original

Unscheduled

Scheduled

Total

Realized

Deferred

Principal

Class

Face Value

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)

(5)=(3)+(4)

(6)=(2)+(5)

(7)

(8)

(9)=(1)-(5)-(7)+(8)

4,799,976,000.00

386,931,317.18

4,620,338,847.23

179,637,152.77

4,799,976,000.00

5,186,907,317.18

1,599,992,000.00

~~581~~588,~~596~~105,~~215~~290.1570

~~744~~770,~~399~~327,~~984~~956.3182

7781,~~869~~208,~~166~~835.2616

~~822~~851,~~269~~536,~~150~~791.5798

1,~~403~~439,~~865~~642,~~365~~082.7268

20,156,333.48

~~797~~768,~~879~~611,~~182~~541.9150

100,523,000.00

14,~~646~~851,~~233~~953.0614

6869,~~809~~664,~~477~~245.3870

5,~~409~~519,~~813~~912.3027

7475,~~219~~184,~~290~~157.6797

8890,~~865~~036,~~523~~111.7311

2625,~~303~~338,~~709~~842.3303

83,769,000.00

13,~~532~~719,~~409~~027.8963

5657,~~941~~653,~~327~~634.2216

4,~~907~~999,~~915~~664.0115

6162,~~849~~653,~~242~~298.2331

7576,~~381~~372,~~652~~325.1294

21,~~919~~115,~~757~~701.7769

33,508,000.00

6,~~712~~801,~~116~~189.9517

2223,~~776~~061,~~901~~824.5028

1,~~963~~999,~~195~~895.3905

2425,~~740~~061,~~096~~719.8932

31,~~452~~862,~~213~~908.8449

8,~~767~~446,~~903~~280.1168

40,209,000.00

11,~~110~~134,~~507~~122.9756

35,~~037~~750,~~816~~123.6761

3,~~278~~370,~~713~~462.2741

3839,~~316~~120,~~529~~586.9402

4950,~~427~~254,~~037~~708.9158

1,~~892~~088,~~470~~413.0698

23,455,000.00

8,~~654~~657,~~359~~388.8083

21,701,370.05

1,610,781.21

23,312,151.26

31,~~966~~969,~~511~~540.0609

142,848.74

20,104,869.34

6,~~070~~235,~~525~~096.3849

220,430.37

19,884,438.97

UT-R

Total

6,701,536,869.34

1,~~029~~036,~~253~~435,~~685~~385.3870

5,~~570~~598,~~005~~498,~~724~~001.3685

~~274~~278,~~676~~346,~~737~~703.2002

5,876,844,~~682,461~~704.5687

6,~~873~~913,~~936~~280,~~146~~090.9457

220,430.37

20,156,333.48

~~876~~844,~~790~~628,~~310~~067.8958

Interest Detail

Pass-

Prior Principal

Non-

Prior

Unscheduled

Paid or

Current

Through

(with Notional)

Accrued

Supported

Unpaid

Interest

Optimal

Deferred

Unpaid

Class

Rate

Balance

Interest

Interest SF

Interest

Adjustments

Interest

(1)

(2)

(3)

(4)

(5)=(1)-(2)+(3)+(4)

(6)

(7)=(5)-(6)

4.~~12000~~48375%

4.~~85360~~98460%

~~813~~781,~~978~~551,~~007~~524.5891

3,~~292~~246,~~271~~437.1016

4.~~23000~~59375%

2625,~~834~~765,~~439~~434.8189

91105,~~438~~208.3586

4.~~63000~~99375%

2221,~~362~~471,~~033~~195.1874

8395,~~404~~308.1725

5.~~58000~~94375%

8,~~944~~588,~~813~~478.2730

4045,~~206~~375.9479

78.~~83000~~19375%

21,~~334~~443,~~745~~908.4703

1410,~~726~~516.4046

########

142,848.74

1,~~361~~548.3132

45.~~83433~~01246%

19,884,438.97

8083,~~106~~058.6236

UT-R

Total

~~894~~858,~~481~~847,~~327~~829.0157

3,~~603~~587,~~514~~453.8920

Page 5 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

A2-2 Components Series 2000-1

Certificate Payment Report for October 25, 2005 Distribution

Certificate Payment Report for December 27, 2005 Distribution

Distribution in Dollars - Current Period

Prior

Current

Class

Original

Principal

Total

Realized

Deferred

Principal

Class

Type

Face Value

Balance

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

(6)

(7)=(1)-(3)-(5)+(6)

A1X

A2X

3,~~279~~264,~~198~~582.5541

M1X

162,~~667~~414.0974

M2X

~~6,683.70~~-

M3X

B1X

B2X

Total

3,~~302~~266,~~549~~997.3415

Interest Accrual Detail

Current Period Factor Information per $1,000 of Original Face

Orig. Principal

Prior

Current

Period

(with Notional)

Principal

Total

Principal

Class

Starting

Ending

Method

Cusip

Balance

Interest

Principal

Distribution

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

A1X

A-30/360

4,799,976,000.00

A2X

A-30/360

1,599,992,000.00

~~508~~488.~~738798~~472145

2.~~049509~~040374

~~498~~480.~~676983~~384615

M1X

A-30/360

100,523,000.00

~~266~~256.~~948259~~313828

0.~~165804~~024022

~~261~~252.~~668567~~070094

M2X

A-30/360

83,769,000.00

~~266~~256.~~948790~~314338

~~0.079787~~-

~~261~~252.~~669087~~070595

M3X

A-30/360

33,508,000.00

~~266~~256.~~945603~~311278

~~261~~252.~~665964~~067586

B1X

A-30/360

40,209,000.00

5835.~~065246~~910071

4727.~~065833~~068914

B2X

A-30/360

23,455,000.00

6.090332

Page 6 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

A2-2 Components Series 2000-1

Certificate Payment Report for October 25, 2005 Distribution

Certificate Payment Report for December 27, 2005 Distribution

Distribution in Dollars - to Date

Current

Original

Unscheduled

Scheduled

Total

Realized

Deferred

Principal

Class

Face Value

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)

(5)=(3)+(4)

(6)=(2)+(5)

(7)

(8)

(9)=(1)-(5)-(7)+(8)

A1X

149,714,942.52

A2X

~~421~~428,~~628~~164,~~983~~330.3059

M1X

9,~~388~~398,~~654~~384.0598

M2X

6,496,460.00

M3X

1,548,952.66

B1X

92,561.42

B2X

18,068.86

Total

~~588~~595,~~888~~433,~~622~~701.8103

Interest Detail

Pass-

Prior Principal

Non-

Prior

Unscheduled

Paid or

Current

Through

(with Notional)

Accrued

Supported

Unpaid

Interest

Optimal

Deferred

Unpaid

Class

Rate

Balance

Interest

Interest SF

Interest

Adjustments

Interest

(1)

(2)

(3)

(4)

(5)=(1)-(2)+(3)+(4)

(6)

(7)=(5)-(6)

A1X

0.~~85166~~22980%

A2X

45.~~83433~~01246%

~~813~~781,~~978~~551,~~007~~524.5891

3,~~279~~264,~~198~~582.5541

M1X

0.~~74533~~11246%

2625,~~834~~765,~~439~~434.8189

162,~~667~~414.0974

M2X

~~0.35866%~~

2221,~~362~~471,~~033~~195.1874

~~6,683.70~~-

M3X

8,~~944~~588,~~813~~478.2730

B1X

21,~~334~~443,~~745~~908.4703

B2X

142,848.74

Total

~~874~~838,~~596~~963,~~888~~390.0460

3,~~302~~266,~~549~~997.3415

Page 7 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collection Account Report for October 25, 2005 Distribution

Collection Account Report for December 27, 2005 Distribution

Collection Account Report

SUMMARY

TOTAL

Principal Collections

1714,~~691~~219,~~016~~761.1299

Principal Withdrawals

0.00

TOTAL PRINCIPAL

1714,~~691~~219,~~016~~761.1299

Interest Collections

3,~~815~~789,~~557~~068.5483

Interest Withdrawals

0.00

Interest Other Accounts

0.00

Interest Fees

(~~212~~201,~~042~~615.6563)

TOTAL INTEREST

3,~~603~~587,~~514~~453.8920

TOTAL AVAILABLE FUNDS

2117,~~294~~807,~~531~~215.0119

PRINCIPAL - COLLECTIONS

TOTAL

Scheduled Principal

1,~~929~~804,~~363~~154.1999

Curtailments

1,~~249~~188,~~810~~442.0651

Prepayments in Full

1411,~~511~~227,~~842~~164.8749

Repurchases/Substitutions

0.00

Liquidations

0.00

Insurance Principal

0.00

Other Additional Principal

0.00

Delinquent Principal

(~~452~~435,~~183~~658.3379)

Principal Advanced

~~452~~435,~~183~~658.3379

Total Realized Loss Of Principal

0.00

TOTAL PRINCIPAL COLLECTED

1714,~~691~~219,~~016~~761.1299

Page 8 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collection Account Report for October 25, 2005 Distribution

Collection Account Report for December 27, 2005 Distribution

Collection Account Report

PRINCIPAL - WITHDRAWALS

TOTAL

SPACE INTENTIONALLY LEFT BLANK

PRINCIPAL - OTHER ACCOUNTS

TOTAL

SPACE INTENTIONALLY LEFT BLANK

INTEREST - COLLECTIONS

TOTAL

Scheduled Interest

3,~~883~~856,~~785~~558.7186

Repurchases/Substitutions

0.00

Liquidations

0.00

Insurance Interest

0.00

Other Additional Interest

0.00

Prepayment Interest Shortfalls

0.00

Delinquent Interest

(~~960~~984,~~895~~948.9746)

Compensating Interest

0.00

Relief Act Shortfall Amounts

0.00

Interest Advanced

~~892~~917,~~667~~458.8043

Deferred Interest

0.00

TOTAL INTEREST

3,~~815~~789,~~557~~068.5483

Page 9 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collection Account Report for October 25, 2005 Distribution

Collection Account Report for December 27, 2005 Distribution

Collection Account Report

INTEREST - WITHDRAWALS

TOTAL

SPACE INTENTIONALLY LEFT BLANK

INTEREST - OTHER ACCOUNTS

TOTAL

SPACE INTENTIONALLY LEFT BLANK

INTEREST - FEES

TOTAL

Curent Servicing Fees

~~211~~200,~~297~~899.2592

Trustee Fee

~~745~~715.4071

TOTAL INTEREST FEES

~~212~~201,~~042~~615.6563

Page 10 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Credit Enhancement Report for October 25, 2005 Distribution

Credit Enhancement Report for December 27, 2005 Distribution

Credit Enhancement Report

ACCOUNTS

TOTAL

Beginning Reserve Fund Balance

5,000.00

Curr Period Required Reserve Fund Deposit

1020,~~278~~559.2599

Curr Distributions from Reserve Fund

(1020,~~278~~559.2599)

Reserve Fund Balance

5,000.00

INSURANCE

TOTAL

SPACE INTENTIONALLY LEFT BLANK

STRUCTURAL FEATURES

TOTAL

SPACE INTENTIONALLY LEFT BLANK

Page 11 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collateral Report for October 25, 2005 Distribution

Collateral Report for December 27, 2005 Distribution

Collateral Report

COLLATERAL

TOTAL

Loan Count:

Original

17816

Prior

3,~~098~~002

Prefunding

Scheduled Paid Offs

Full Voluntary Prepayments

(4836)

Repurchases

Liquidations

Current

32,~~050~~966

Principal Balance:

Original

6,701,536,869.34

Prior

~~894~~858,~~481~~847,~~327~~829.0157

Prefunding

Scheduled Principal

(1,~~929~~804,~~363~~154.1999)

Partial and Full Voluntary Prepayments

(1512,~~761~~415,~~652~~607.9300)

Repurchases

Liquidations

Current

~~876~~844,~~790~~628,~~310~~067.8958

PREFUNDING

TOTAL

SPACE INTENTIONALLY LEFT BLANK

Current Prin Balance by Groups (in millions of dollars)

Total Current Principal Balance (in millions of dollars)

Page 12 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collateral Report for October 25, 2005 Distribution

Collateral Report for December 27, 2005 Distribution

Collateral Report

CHARACTERISTICS

TOTAL

Weighted Average Coupon Original

7.423436%

Weighted Average Coupon Prior

5.~~148355~~295188%

Weighted Average Coupon Current

5.~~210330~~388464%

Weighted Average Months to Maturity Original

332

Weighted Average Months to Maturity Prior

~~265~~263

Weighted Average Months to Maturity Current

~~264~~262

Weighted Avg Remaining Amortization Term Original

Weighted Avg Remaining Amortization Term Prior

~~264~~263

Weighted Avg Remaining Amortization Term Current

~~264~~262

Weighted Average Seasoning Original

Weighted Average Seasoning Prior

~~132~~134.5386

Weighted Average Seasoning Current

~~133~~135.7395

Note: Original information refers to deal issue.

WAC by Groups

Total WAC

WARAT by Groups

Total WARAT

Note: Dates correspond to distribution dates.

Page 13 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collateral Report for October 25, 2005 Distribution

Collateral Report for December 27, 2005 Distribution

Collateral Report

ARM CHARACTERISTICS

TOTAL

Weighted Average Margin Original

0.000%

Weighted Average Margin Prior

2.~~413~~408%

Weighted Average Margin Current

2.~~411~~407%

Weighted Average Max Rate Original

0.000%

Weighted Average Max Rate Prior

13.~~453~~478%

Weighted Average Max Rate Current

13.~~455~~505%

Weighted Average Min Rate Original

0.000%

Weighted Average Min Rate Prior

3.~~140~~128%

Weighted Average Min Rate Current

3.~~133~~126%

Weighted Average Cap Up Original

0.000%

Weighted Average Cap Up Prior

0.001%

Weighted Average Cap Up Current

0.001%

Weighted Average Cap Down Original

0.000%

Weighted Average Cap Down Prior

0.001%

Weighted Average Cap Down Current

0.001%

Note: Original information refers to deal issue.

SERVICING FEES / ADVANCES

TOTAL

Current Servicing Fees

~~211~~200,~~297~~899.2592

Delinquent Servicing Fees

6867,~~228~~490.1703

TOTAL SERVICING FEES

~~279~~268,~~525~~389.4295

Total Servicing Fees

~~279~~268,~~525~~389.4295

Compensating Interest

0.00

Delinquent Servicing Fees

(6867,~~228~~490.1703)

COLLECTED SERVICING FEES

~~211~~200,~~297~~899.2592

Current PPIS

0.00

Current Net PPIS

0.00

Total Advanced Principal For Current Payment Date

~~452~~435,~~183~~658.3379

Total Advanced Interest For Current Payment Date

~~892~~917,~~667~~458.8043

TOTAL ADVANCES FOR CURRENT PERIOD

1,~~344~~353,~~851~~117.1322

ADDITIONAL COLLATERAL INFORMATION

TOTAL

SPACE INTENTIONALLY LEFT BLANK

Page 14 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Delinquency Report for October 25, 2005 Distribution

Delinquency Report for December 27, 2005 Distribution

Delinquency Report - Total

<1 PAYMENT

1 PAYMENT

2 PAYMENTS

3+ PAYMENTS

TOTAL

DELINQUENT

Balance

5,~~084~~142,~~410~~403.2350

~~877~~2,~~183~~855,665.3205

~~672~~262,~~660~~873.0868

68,~~634~~260,~~253~~942.6323

% Balance

0.5861%

0.1034%

0.0803%

0.7698%

# Loans

1613

2120

% # Loans

0.5244%

0.1020%

0.0703%

0.6967%

FORECLOSURE

Balance

~~562~~825,~~024~~285.5676

% Balance

0.00%

0.06%

# Loans

% # Loans

0.00%

0.07%

BANKRUPTCY

Balance

1,539,902.39

373,872.36

1,913,774.75

% Balance

0.18%

0.00%

0.04%

0.00%

0.22%

# Loans

% # Loans

0.20%

0.00%

0.03%

0.00%

0.23%

REO

Balance

864,397.96

% Balance

0.00%

0.10%

# Loans

% # Loans

0.00%

0.0710%

TOTAL

Balance

1,539,902.39

5,084,410.23

1,251,055.68

2,099,082.60

9,974,450.90

BANKRUPTCY

Balance

1,526,073.73

373,192.96

1,899,266.69

% Balance

0.18%

0.5800%

0.1400%

0.2404%

10.1422%

# Loans

16-

327

% # Loans

0.20%

0.5200%

0.1300%

0.2003%

10.0524%

REO

Balance

597,713.18

% Balance

0.00%

0.07%

# Loans

% # Loans

0.00%

0.03%

TOTAL

Balance

1,526,073.73

5,142,403.50

2,855,665.05

2,059,065.58

11,583,207.86

% Balance

0.18%

0.61%

0.34%

0.24%

1.37%

# Loans

% # Loans

0.20%

0.44%

0.20%

1.05%

Note: <1 Payment = 0-29days, 1 Payment = 30-59days, 2 Payments = 60-89days, 3+ Payments = 90+

6 Months Moving Average

1 or 2 Payments Delinquent

3 or More Payments Delinquent

Total Foreclosure

Total Bankruptcy and REO

Note: Dates correspond to distribution dates.

Page 15 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

REO Report for October 25, 2005 Distribution

REO Report for December 27, 2005 Distribution

REO Report - Mortgage Loans that Become REO During Current Distribution

SUMMARY

LOAN GROUP

Total Loan Count = 0

Loan Group 1 = ; REO Book Value = Not Available

Total Original Principal Balance = 000.00

Total Current Balance = 000.00

REO Book Value = Not Available

REO Book Value reported corresponds to total REO loans, including loans that become REO during current distribution.

Loan Number

Original

Stated

Current

State &

Principal

Paid to

Note

LTV at

Original

Origination

Loan Group

Balance

Date

Rate

Origination

Term

Date

SPACE INTENTIONALLY LEFT BLANK

Page 16 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Prepayment Report for October 25, 2005 Distribution

Prepayment Report for December 27, 2005 Distribution

Prepayment Report - Voluntary Prepayments

VOLUNTARY PREPAYMENTS

TOTAL

Current

Number of Paid in Full Loans

4836

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

4836

Paid in Full Balance

1411,~~511~~227,~~842~~164.8749

Repurchased Loans Balance

Curtailments Amount

1,~~249~~188,~~810~~442.0651

Total Prepayment Amount

1512,~~761~~415,~~652~~607.9300

Cumulative

Number of Paid in Full Loans

9,~~763~~847

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

9,~~763~~847

Paid in Full Balance

5,~~338~~364,~~389~~709,~~327~~381.1707

Repurchased Loans Balance

Curtailments Amount

~~208~~210,~~775~~947,~~301~~524.3998

Total Prepayment Amount

5,~~547~~575,~~164~~656,~~628~~906.5605

SPACE INTENTIONALLY LEFT BLANK

Total Prepayments by Groups (in thousands of dollars)

Total Prepayments (in thousands of dollars)

Page 17 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Prepayment Report for October 25, 2005 Distribution

Prepayment Report for December 27, 2005 Distribution

Prepayment Report - Voluntary Prepayments

VOLUNTARY PREPAYMENT RATES

TOTAL

SMM

1.7745%

3 Months Avg SMM

1.7068%

12 Months Avg SMM

1.7877%

Avg SMM Since Cut-off

2.8076%

CPR

1916.2506%

3 Months Avg CPR

18.6244%

12 Months Avg CPR

19.3629%

Avg CPR Since Cut-off

28.8657%

PSA

~~320~~267.8273%

3 Months Avg PSA Approximation

~~310~~307.3332%

12 Months Avg PSA Approximation

~~322~~321.6045%

Avg PSA Since Cut-off Approximation

~~481~~476.0012%

CPR by Groups

Total CPR

PSA by Groups

Total PSA

Page 18 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Prepayment Report for October 25, 2005 Distribution

Prepayment Report for December 27, 2005 Distribution

Prepayment Report - Voluntary Prepayments

CPR Avg since Cut-Off by Groups

Total CPR Avg since Cut-Off

PSA Avg since Cut-Off by Groups

Total PSA Avg since Cut-Off

PREPAYMENT CALCULATION METHODOLOGY

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)

PSA Standard Prepayment Model: CPR/(0.02*min(30,WAS))

Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn) * (1-SMMn+1) *…….*(1-SMMm)]^(1/months in period n,m)

Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)

Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.002*Avg WASn,m))

Average WASn,m: (min(30,WASn)+min(30,WASn+1)+…….+min(30,WASm)/(number of months in the period n,m)

Weighted Average Seasoning (WAS)

Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.

Dates correspond to distribution dates.

Page 19 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Realized Loss Report for October 25, 2005 Distribution

Realized Loss Report for December 27, 2005 Distribution

Realized Loss Report - Collateral

COLLATERAL REALIZED LOSSES

TOTAL

Current

Number of Loans Liquidated

Collateral Realized Loss/(Gain) Amount

Net Liquidation Proceeds

Cumulative

Number of Loans Liquidated

Collateral Realized Loss/(Gain) Amount

220,430.37

Net Liquidation Proceeds

2,684,762.32

Note: Collateral Realized Loss Amount may include adjustments to loans liquidated in prior periods.

SPACE INTENTIONALLY LEFT BLANK

3 Months Moving Average

Collateral Loss Severity Approximation by Groups

Collateral Loss Severity Approximation

Page 20 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Realized Loss Report for October 25, 2005 Distribution

Realized Loss Report for December 27, 2005 Distribution

Realized Loss Report - Collateral

DEFAULT SPEEDS

TOTAL

MDR

0.00%

3 Months Avg MDR

0.00%

12 Months Avg MDR

0.02%

Avg MDR Since Cut-off

0.00%

CDR

0.00%

3 Months Avg CDR

0.00%

12 Months Avg CDR

0.2825%

Avg CDR Since Cut-off

0.05%

SDA

0.00%

3 Months Avg SDA Approximation

0.00%

12 Months Avg SDA Approximation

98.2347%

Avg SDA Since Cut-off Approximation

0.3233%

Loss Severity Approximation for Current Period

3 Months Avg Loss Severity Approximation

12 Months Avg Loss Severity Approximation

Avg Loss Severity Approximation Since Cut-off

CDR by Groups

Total CDR

SDA by Groups

Total SDA

Page 21 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Realized Loss Report for October 25, 2005 Distribution

Realized Loss Report for December 27, 2005 Distribution

Realized Loss Report - Collateral

CDR Avg since Cut-Off by Groups

Total CDR Avg since Cut-Off

SDA Avg since Cut-Off by Groups

Total SDA Avg since Cut-Off

COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY

Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)

Conditional Default Rate (CDR): 1-((1-MDR)^12)

SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)*0.02,MAX(0.03,MIN(30,WAS)*0.02-0.0095*(WAS-60)))

Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn) * (1-MDRn+1) *…….*(1-MDRm)]^(1/months in period n,m)

Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)

Average SDA Approximation over period between the nth month and mth month:

AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)*0.02,MAX(0.03,MIN(30,Avg WASn,m)*0.02-0.0095*(Avg WASn,m-60)))

Average WASn,m: (WASn + WASn+1 +…….+ WASm )/(number of months in the period n,m)

Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)

Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.

Dates correspond to distribution dates.

Page 22 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Realized Loss Detail Report for October 25, 2005 Distribution

Realized Loss Detail Report for December 27, 2005 Distribution

Realized Loss Detail Report - Loans Liquidated During Current Distribution

SUMMARY

LOAN GROUP

Total Loan Count Current Losses = 0

Total Loan Count Revisions = 0

Loan Group 1 =

Total Prior Principal Balance = 0.00

Total Current Realized Loss Amount = 0.00

Total Revisions Amount = 0.00

Total Realized Loss Amount = 0.00

Total Net Liquidation Proceeds = 0.00

Note: Total Realized Loss Amount may include adjustments to loans liquidated in prior periods.

Loan Number

Current

State &

Prior

Realized

Cumulative

Loan

Note

LTV at

Original

Principal

Loss/(Gain)

Realized

Loan Group

Status

Rate

Origination

Term

Balance

Revisions

Loss/(Gain)

SPACE INTENTIONALLY LEFT BLANK

Page 23 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Additional Certificate Report for October 25, 2005 Distribution

Additional Certificate Report for December 27, 2005 Distribution

Additional Certificate Report

CLASS

Carryforward Interest

Basis Risk Shortfall Reimbursed

Basis Risk Shortfall

Unpaid Basis Risk Shortfall

0.00

05,621.0092

0.00

49,~~171~~501.7926

0.00

54,~~320~~485.6318

0.00

~~785~~951.8363

0.00

Page 24 of 24

Filing Compare · WASHINGTON MUTUAL MORT PS THR CERTS SER 2003-R1