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): ~~August~~October 25, 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 ~~August~~October 25, 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: ~~Aug~~Oct 2628, 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 ~~August~~October 25, 2005.

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

August 25, 2005 Distribution

October 25, 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: August 25, 2005

Distribution Date: October 25, 2005

Underwriter(s):

Lehman Brothers Underwriter

Record Date: ~~August~~October 24, 2005

July 29, 2005

September 30, 2005

Page 1 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Lower Tier REMIC Series 2000-1

Certificate Payment Report for August 25, 2005 Distribution

Certificate Payment Report for October 25, 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

~~845~~813,~~548~~978,~~205~~007.0858

3,~~312~~279,~~096~~198.8455

1116,~~585~~098,~~585~~824.8767

1419,~~897~~378,~~682~~023.7122

~~833~~797,~~962~~879,~~619~~182.2291

LT-M1

100,523,000.00

2726,~~875~~834,~~215~~439.5581

~~109~~108,~~190~~105.0145

~~381~~530,~~942~~730.3948

~~491~~638,~~132~~835.4093

2726,~~493~~303,~~273~~709.1633

LT-M2

83,769,000.00

2322,~~229~~362,~~346~~033.2918

90,~~991~~087.6787

~~318~~442,~~285~~275.3340

~~409~~532,~~277~~363.0027

2221,~~911~~919,~~060~~757.9777

LT-M3

33,508,000.00

98,~~291~~944,~~738~~813.5227

36,~~396~~035.6715

~~127~~176,~~314~~910.1316

~~163~~212,~~710~~945.8031

98,~~164~~767,~~424~~903.3911

LT-B1

40,209,000.00

32,~~202~~334,~~058~~745.5847

129,~~542~~405.7877

~~318~~442,~~285~~275.3340

~~330~~451,~~828~~681.1117

21,~~883~~892,~~773~~470.2606

LT-B2

23,455,000.00

142,848.74

~~559~~575.5548

142,848.74

LT-B3

20,104,869.34

19,884,438.97

7780,~~889~~106.3462

19,884,438.97

LT-R

Total

6,701,536,869.34

~~929~~894,~~173~~481,~~851~~327.7401

3,~~639~~603,~~666~~514.8689

1217,~~731~~691,~~413~~016.0412

1621,~~371~~294,~~079~~531.9001

~~916~~876,~~442~~790,~~438~~310.7089

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

~~528~~508.~~470271~~738798

2.~~070071~~049509

710.~~241027~~061816

912.~~311098~~111325

~~521~~498.~~229243~~676983

LT-M1

F-30/360

100,523,000.00

~~277~~266.~~301867~~948259

1.~~086219~~075430

35.~~799552~~279692

46.~~885771~~355122

~~273~~261.~~502315~~668567

LT-M2

F-30/360

83,769,000.00

~~277~~266.~~302418~~948790

1.~~086221~~075432

35.~~799560~~279703

46.~~885781~~355135

~~273~~261.~~502859~~669087

LT-M3

F-30/360

33,508,000.00

~~277~~266.~~299108~~945603

1.~~086208~~075419

35.~~799514~~279640

46.~~885723~~355059

~~273~~261.~~499594~~665964

LT-B1

F-30/360

40,209,000.00

7958.~~635370~~065246

0.~~311940~~233922

710.~~915773~~999413

811.~~227713~~233335

7147.~~719597~~065833

LT-B2

F-30/360

23,455,000.00

6.090332

0.~~023856~~024535

6.090332

LT-B3

F-30/360

20,104,869.34

989.035971

3.~~874153~~984439

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 August 25, 2005 Distribution

Certificate Payment Report for October 25, 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

~~415~~421,~~033~~628,~~146~~983.4327

~~786~~822,~~185~~269,~~714~~150.2657

1,~~201~~243,~~218~~898,~~860~~133.6984

20,156,333.48

~~833~~797,~~962~~879,~~619~~182.2291

LT-M1

100,523,000.00

2324,~~784~~001,~~357~~802.7592

7374,~~029~~219,~~726~~290.8467

9698,~~814~~221,~~084~~093.59

2726,~~493~~303,~~273~~709.1633

LT-M2

83,769,000.00

19,~~719~~901,~~948~~152.4879

6061,~~857~~849,~~939~~242.0323

8081,~~577~~750,~~887~~395.5102

2221,~~911~~919,~~060~~757.9777

LT-M3

33,508,000.00

7,~~888~~960,~~057~~539.3608

24,~~343~~740,~~575~~096.6189

32,~~231~~700,~~632~~635.97

98,~~164~~767,~~424~~903.3911

LT-B1

40,209,000.00

9,~~114~~134,~~041~~916.9942

3738,~~325~~316,~~226~~529.7494

4647,~~439~~451,~~268~~446.7336

21,~~883~~892,~~773~~470.2606

LT-B2

23,455,000.00

4,~~693~~694,~~544~~687.1977

23,312,151.26

28,~~005~~006,~~695~~839.4503

142,848.74

LT-B3

20,104,869.34

56,~~911~~070,~~339~~525.1241

220,430.37

19,884,438.97

LT-R

Total

6,701,536,869.34

1,~~022~~029,~~005~~253,~~513~~685.0236

4,620,338,847.23

1,~~184~~224,~~691~~343,~~486~~614.5233

5,~~805~~844,~~030~~682,~~333~~461.7556

6,~~827~~873,~~035~~936,~~846~~146.7792

220,430.37

20,156,333.48

~~916~~876,~~442~~790,~~438~~310.7089

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

4.~~70052~~83433%

LT-A2

4.~~70052~~83433%

~~845~~813,~~548~~978,~~205~~007.0858

3,~~312~~279,~~096~~198.8455

LT-M1

4.~~70052~~83433%

2726,~~875~~834,~~215~~439.5581

~~109~~108,~~190~~105.0145

LT-M2

4.~~70052~~83433%

2322,~~229~~362,~~346~~033.2918

90,~~991~~087.6787

LT-M3

4.~~70052~~83433%

98,~~291~~944,~~738~~813.5227

36,~~396~~035.6715

LT-B1

4.~~70052~~83433%

32,~~202~~334,~~058~~745.5847

129,~~542~~405.7877

LT-B2

4.~~70052~~83433%

142,848.74

~~559~~575.5548

LT-B3

4.~~70052~~83433%

19,884,438.97

7780,~~889~~106.3462

LT-R

Total

~~929~~894,~~173~~481,~~851~~327.7401

3,~~639~~603,~~666~~514.8689

Page 3 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Upper Tier REMIC Series 2000-1

Certificate Payment Report for August 25, 2005 Distribution

Certificate Payment Report for October 25, 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

~~845~~813,~~548~~978,~~205~~007.0858

3,~~320~~292,~~244~~271.7110

1116,~~585~~098,~~585~~824.8767

1419,~~905~~391,~~830~~095.5877

~~833~~797,~~962~~879,~~619~~182.2291

MEZ, STEP

100,523,000.00

2726,~~875~~834,~~215~~439.5581

9291,~~654~~438.1235

~~381~~530,~~942~~730.3948

~~474~~622,~~596~~168.5183

2726,~~493~~303,~~273~~709.1633

MEZ, STEP

83,769,000.00

2322,~~229~~362,~~346~~033.2918

8583,~~212~~404.9917

~~318~~442,~~285~~275.3340

~~403~~525,~~498~~679.3257

2221,~~911~~919,~~060~~757.9777

MEZ, STEP

33,508,000.00

98,~~291~~944,~~738~~813.5227

4140,~~686~~206.3594

~~127~~176,~~314~~910.1316

~~169~~217,~~000~~117.4810

98,~~164~~767,~~424~~903.3911

SUB, STEP

40,209,000.00

32,~~202~~334,~~058~~745.5847

2014,~~569~~726.6740

~~318~~442,~~285~~275.3340

~~338~~457,~~855~~001.0080

21,~~883~~892,~~773~~470.2606

SUB, STEP

23,455,000.00

142,848.74

1,~~409~~361.6831

142,848.74

SUB, CSTR

20,104,869.34

19,884,438.97

7780,~~889~~106.3462

19,884,438.97

UT-R

Total

6,701,536,869.34

~~929~~894,~~173~~481,~~851~~327.7401

3,~~639~~603,~~666~~514.8689

1217,~~731~~691,~~413~~016.0412

1621,~~371~~294,~~079~~531.9001

~~916~~876,~~442~~790,~~438~~310.7089

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)

0709/2526/05

0810/24/05

A-Act/360

863572L68

4,799,976,000.00

F-30/360

863572L76

1,599,992,000.00

~~528~~508.~~470271~~738798

2.~~075163~~057680

710.~~241027~~061816

912.~~316191~~119495

~~521~~498.~~229243~~676983

0709/2526/05

0810/24/05

A-Act/360

863572L84

100,523,000.00

~~277~~266.~~301867~~948259

0.~~921721~~909626

35.~~799552~~279692

46.~~721273~~189318

~~273~~261.~~502315~~668567

0709/2526/05

0810/24/05

A-Act/360

863572L92

83,769,000.00

~~277~~266.~~302418~~948790

10.~~017238~~995645

35.~~799560~~279703

46.~~816798~~275347

~~273~~261.~~502859~~669087

0709/2526/05

0810/24/05

A-Act/360

863572M26

33,508,000.00

~~277~~266.~~299108~~945603

1.~~244072~~199921

35.~~799514~~279640

56.~~043586~~479560

~~273~~261.~~499594~~665964

0709/2526/05

0810/24/05

A-Act/360

863572M34

40,209,000.00

7958.~~635370~~065246

0.~~511569~~366246

710.~~915773~~999413

811.~~427342~~365660

7147.~~719597~~065833

0709/2526/05

0810/24/05

A-Act/360

863572M42

23,455,000.00

6.090332

0.~~060101~~058039

6.090332

F-30/360

863572M59

20,104,869.34

989.035971

3.~~874153~~984439

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 August 25, 2005 Distribution

Certificate Payment Report for October 25, 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

~~574~~581,~~992~~596,~~559~~215.3415

~~711~~744,~~868~~399,~~256~~984.5531

7477,~~317~~869,~~457~~166.7126

~~786~~822,~~185~~269,~~714~~150.2657

1,~~361~~403,~~178~~865,~~273~~365.6072

20,156,333.48

~~833~~797,~~962~~879,~~619~~182.2291

100,523,000.00

14,~~456~~646,~~032~~233.7606

6768,~~737~~809,~~002~~477.8438

5,~~292~~409,~~724~~813.0030

7374,~~029~~219,~~726~~290.8467

8788,~~485~~865,~~759~~523.6073

2726,~~493~~303,~~273~~709.1633

83,769,000.00

13,~~358~~532,~~557~~409.9489

56,~~047~~941,~~598~~327.4422

4,~~810~~907,~~340~~915.6001

6061,~~857~~849,~~939~~242.0323

7475,~~216~~381,~~496~~652.9712

2221,~~911~~919,~~060~~757.9777

33,508,000.00

6,~~627~~712,~~992~~116.0695

22,~~419~~776,~~409~~901.9950

1,~~924~~963,~~165~~195.6239

24,~~343~~740,~~575~~096.6189

3031,~~971~~452,~~567~~213.6784

98,~~164~~767,~~424~~903.3911

40,209,000.00

11,~~076~~110,~~194~~507.3497

3435,~~144~~037,~~087~~816.8967

3,~~181~~278,~~138~~713.8627

3738,~~325~~316,~~226~~529.7494

4849,~~401~~427,~~421~~037.0891

21,~~883~~892,~~773~~470.2606

23,455,000.00

8,~~651~~654,~~520~~359.3380

21,701,370.05

1,610,781.21

23,312,151.26

31,~~963~~966,~~671~~511.5906

142,848.74

20,104,869.34

56,~~911~~070,~~339~~525.0938

220,430.37

19,884,438.97

UT-R

Total

6,701,536,869.34

1,~~022~~029,~~005~~253,~~513~~685.0438

5,~~534~~570,~~256~~005,~~572~~724.9836

~~270~~274,~~773~~676,~~760~~737.7720

5,~~805~~844,~~030~~682,~~333~~461.7556

6,~~827~~873,~~035~~936,~~846~~146.7994

220,430.37

20,156,333.48

~~916~~876,~~442~~790,~~438~~310.7089

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)

34.~~75000~~12000%

4.~~71208~~85360%

~~845~~813,~~548~~978,~~205~~007.0858

3,~~320~~292,~~244~~271.7110

34.~~86000~~23000%

2726,~~875~~834,~~215~~439.5581

9291,~~654~~438.1235

4.~~26000~~63000%

2322,~~229~~362,~~346~~033.2918

8583,~~212~~404.9917

5.~~21000~~58000%

98,~~291~~944,~~738~~813.5227

4140,~~686~~206.3594

7.~~46000~~83000%

32,~~202~~334,~~058~~745.5847

2014,~~569~~726.6740

########

142,848.74

1,~~409~~361.6831

4.~~70052~~83433%

19,884,438.97

7780,~~889~~106.3462

UT-R

Total

~~929~~894,~~173~~481,~~851~~327.7401

3,~~639~~603,~~666~~514.8689

Page 5 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

A2-2 Components Series 2000-1

Certificate Payment Report for August 25, 2005 Distribution

Certificate Payment Report for October 25, 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,~~312~~279,~~096~~198.8455

M1X

16,~~535~~667.8909

M2X

56,~~778~~683.6970

M3X

B1X

B2X

Total

3,~~334~~302,~~411~~549.4234

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

~~528~~508.~~470271~~738798

2.~~070071~~049509

~~521~~498.~~229243~~676983

M1X

A-30/360

100,523,000.00

~~277~~266.~~301867~~948259

0.~~164499~~165804

~~273~~261.~~502315~~668567

M2X

A-30/360

83,769,000.00

~~277~~266.~~302418~~948790

0.~~068984~~079787

~~273~~261.~~502859~~669087

M3X

A-30/360

33,508,000.00

~~277~~266.~~299108~~945603

~~273~~261.~~499594~~665964

B1X

A-30/360

40,209,000.00

7958.~~635370~~065246

7147.~~719597~~065833

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 August 25, 2005 Distribution

Certificate Payment Report for October 25, 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

~~415~~421,~~033~~628,~~146~~983.4630

M1X

9,~~361~~388,~~409~~654.1805

M2X

6,~~489~~496,~~107~~460.6400

M3X

1,548,952.66

B1X

92,561.42

B2X

18,068.86

Total

~~582~~588,~~258~~888,~~188~~622.7481

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.~~82552~~85166%

A2X

4.~~70052~~83433%

~~845~~813,~~548~~978,~~205~~007.0858

3,~~312~~279,~~096~~198.8455

M1X

0.~~71185~~74533%

2726,~~875~~834,~~215~~439.5581

16,~~535~~667.8909

M2X

0.~~29852~~35866%

2322,~~229~~362,~~346~~033.2918

56,~~778~~683.6970

M3X

98,~~291~~944,~~738~~813.5227

B1X

32,~~202~~334,~~058~~745.5847

B2X

142,848.74

Total

~~909~~874,~~289~~596,~~412~~888.7704

3,~~334~~302,~~411~~549.4234

Page 7 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collection Account Report for August 25, 2005 Distribution

Collection Account Report for October 25, 2005 Distribution

Collection Account Report

SUMMARY

TOTAL

Principal Collections

1217,~~731~~691,~~413~~016.0412

Principal Withdrawals

0.00

TOTAL PRINCIPAL

1217,~~731~~691,~~413~~016.0412

Interest Collections

3,~~871~~815,~~081~~557.8854

Interest Withdrawals

0.00

Interest Other Accounts

0.00

Interest Fees

(~~231~~212,~~415~~042.0265)

TOTAL INTEREST

3,~~639~~603,~~666~~514.8689

TOTAL AVAILABLE FUNDS

1621,~~371~~294,~~079~~531.9001

PRINCIPAL - COLLECTIONS

TOTAL

Scheduled Principal

21,~~044~~929,~~719~~363.6719

Curtailments

~~934~~1,~~105~~249,810.4806

Prepayments in Full

914,~~752~~511,~~587~~842.8987

Repurchases/Substitutions

0.00

Liquidations

0.00

Insurance Principal

0.00

Other Additional Principal

0.00

Delinquent Principal

(~~401~~452,~~879~~183.4433)

Principal Advanced

~~401~~452,~~879~~183.4433

Total Realized Loss Of Principal

0.00

TOTAL PRINCIPAL COLLECTED

1217,~~731~~691,~~413~~016.0412

Page 8 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collection Account Report for August 25, 2005 Distribution

Collection Account Report for October 25, 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,~~930~~883,~~808~~785.0071

Repurchases/Substitutions

0.00

Liquidations

0.00

Insurance Interest

0.00

Other Additional Interest

0.00

Prepayment Interest Shortfalls

0.00

Delinquent Interest

(~~819~~960,~~167~~895.1697)

Compensating Interest

0.00

Relief Act Shortfall Amounts

0.00

Interest Advanced

~~759~~892,~~441~~667.0480

Deferred Interest

0.00

TOTAL INTEREST

3,~~871~~815,~~081~~557.8854

Page 9 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collection Account Report for August 25, 2005 Distribution

Collection Account Report for October 25, 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

~~230~~211,~~640~~297.7125

Trustee Fee

~~774~~745.3140

TOTAL INTEREST FEES

~~231~~212,~~415~~042.0265

Page 10 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Credit Enhancement Report for August 25, 2005 Distribution

Credit Enhancement Report for October 25, 2005 Distribution

Credit Enhancement Report

ACCOUNTS

TOTAL

Beginning Reserve Fund Balance

5,000.00

Curr Period Required Reserve Fund Deposit

1410,~~166~~278.7025

Curr Distributions from Reserve Fund

(1410,~~166~~278.7025)

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 August 25, 2005 Distribution

Collateral Report for October 25, 2005 Distribution

Collateral Report

COLLATERAL

TOTAL

Loan Count:

Original

17816

Prior

3,~~194~~098

Prefunding

Scheduled Paid Offs

Full Voluntary Prepayments

(3748)

Repurchases

Liquidations

Current

3,~~157~~050

Principal Balance:

Original

6,701,536,869.34

Prior

~~929~~894,~~173~~481,~~851~~327.7401

Prefunding

Scheduled Principal

(21,~~044~~929,~~719~~363.6719)

Partial and Full Voluntary Prepayments

(1015,~~686~~761,~~693~~652.3793)

Repurchases

Liquidations

Current

~~916~~876,~~442~~790,~~438~~310.7089

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 August 25, 2005 Distribution

Collateral Report for October 25, 2005 Distribution

Collateral Report

CHARACTERISTICS

TOTAL

Weighted Average Coupon Original

7.423436%

Weighted Average Coupon Prior

45.~~981604~~148355%

Weighted Average Coupon Current

5.~~076520~~210330%

Weighted Average Months to Maturity Original

332

Weighted Average Months to Maturity Prior

~~267~~265

Weighted Average Months to Maturity Current

~~266~~264

Weighted Avg Remaining Amortization Term Original

Weighted Avg Remaining Amortization Term Prior

~~267~~264

Weighted Avg Remaining Amortization Term Current

~~266~~264

Weighted Average Seasoning Original

Weighted Average Seasoning Prior

~~130~~132.4053

Weighted Average Seasoning Current

~~131~~133.4173

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 August 25, 2005 Distribution

Collateral Report for October 25, 2005 Distribution

Collateral Report

ARM CHARACTERISTICS

TOTAL

Weighted Average Margin Original

0.000%

Weighted Average Margin Prior

2.~~414~~413%

Weighted Average Margin Current

2.~~412~~411%

Weighted Average Max Rate Original

0.000%

Weighted Average Max Rate Prior

13.453%

Weighted Average Max Rate Current

13.~~439~~455%

Weighted Average Min Rate Original

0.000%

Weighted Average Min Rate Prior

3.~~149~~140%

Weighted Average Min Rate Current

3.~~142~~133%

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

~~230~~211,~~640~~297.7125

Delinquent Servicing Fees

5968,~~726~~228.1217

TOTAL SERVICING FEES

~~290~~279,~~366~~525.8342

Total Servicing Fees

~~290~~279,~~366~~525.8342

Compensating Interest

0.00

Delinquent Servicing Fees

(5968,~~726~~228.1217)

COLLECTED SERVICING FEES

~~230~~211,~~640~~297.7125

Current PPIS

0.00

Current Net PPIS

0.00

Total Advanced Principal For Current Payment Date

~~401~~452,~~879~~183.4433

Total Advanced Interest For Current Payment Date

~~759~~892,~~441~~667.0480

TOTAL ADVANCES FOR CURRENT PERIOD

1,~~161~~344,~~320~~851.4813

ADDITIONAL COLLATERAL INFORMATION

TOTAL

SPACE INTENTIONALLY LEFT BLANK

Page 14 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Delinquency Report for August 25, 2005 Distribution

Delinquency Report for October 25, 2005 Distribution

Delinquency Report - Total

<1 PAYMENT

1 PAYMENT

2 PAYMENTS

3+ PAYMENTS

TOTAL

DELINQUENT

Balance

25,~~757~~084,~~822~~410.4423

~~969~~877,~~739~~183.4232

3672,~~513,925~~660.3208

76,~~241~~634,~~487~~253.1863

% Balance

0.3058%

0.1110%

0.3808%

0.7976%

# Loans

1016

122

2521

% # Loans

0.3252%

0.10%

0.3807%

0.7969%

FORECLOSURE

Balance

1562,~~332,570~~024.1256

% Balance

0.00%

0.1506%

# Loans

% # Loans

0.00%

0.03%

BANKRUPTCY

Balance

985,411.09

615,864.54

434,734.47

2,036,010.10

% Balance

0.11%

0.07%

0.00%

0.05%

0.22%

# Loans

% # Loans

0.10%

0.06%

0.00%

0.03%

0.19%

REO

Balance

865,703.54

% Balance

0.00%

0.09%

# Loans

% # Loans

0.00%

0.0607%

TOTAL

Balance

985,411.09

3,373,686.98

969,739.42

6,146,933.45

11,475,770.94

BANKRUPTCY

Balance

1,539,902.39

373,872.36

1,913,774.75

% Balance

0.1118%

0.3700%

0.1104%

0.6700%

10.2522%

# Loans

12-

16-

347

% # Loans

0.1020%

0.3800%

0.1003%

0.5100%

10.0823%

REO

Balance

864,397.96

% Balance

0.00%

0.10%

# Loans

% # Loans

0.00%

0.07%

TOTAL

Balance

1,539,902.39

5,084,410.23

1,251,055.68

2,099,082.60

9,974,450.90

% Balance

0.18%

0.58%

0.14%

0.24%

1.14%

# Loans

% # Loans

0.20%

0.52%

0.13%

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 August 25, 2005 Distribution

REO Report for October 25, 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 August 25, 2005 Distribution

Prepayment Report for October 25, 2005 Distribution

Prepayment Report - Voluntary Prepayments

VOLUNTARY PREPAYMENTS

TOTAL

Current

Number of Paid in Full Loans

3748

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

3748

Paid in Full Balance

914,~~752~~511,~~587~~842.8987

Repurchased Loans Balance

Curtailments Amount

~~934~~1,~~105~~249,810.4806

Total Prepayment Amount

1015,~~686~~761,~~693~~652.3793

Cumulative

Number of Paid in Full Loans

9,~~656~~763

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

9,~~656~~763

Paid in Full Balance

5,~~306~~338,~~387~~389,~~039~~327.7817

Repurchased Loans Balance

Curtailments Amount

~~205~~208,~~028~~775,~~437~~301.4039

Total Prepayment Amount

5,~~511~~547,~~415~~164,~~477~~628.1856

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 August 25, 2005 Distribution

Prepayment Report for October 25, 2005 Distribution

Prepayment Report - Voluntary Prepayments

VOLUNTARY PREPAYMENT RATES

TOTAL

SMM

1.1577%

3 Months Avg SMM

1.6170%

12 Months Avg SMM

1.8078%

Avg SMM Since Cut-off

2.8280%

CPR

1219.9925%

3 Months Avg CPR

1718.6762%

12 Months Avg CPR

19.6236%

Avg CPR Since Cut-off

2928.0886%

PSA

~~216~~320.4782%

3 Months Avg PSA Approximation

~~294~~310.4433%

12 Months Avg PSA Approximation

~~326~~322.9660%

Avg PSA Since Cut-off Approximation

~~484~~481.6800%

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 August 25, 2005 Distribution

Prepayment Report for October 25, 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 August 25, 2005 Distribution

Realized Loss Report for October 25, 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 August 25, 2005 Distribution

Realized Loss Report for October 25, 2005 Distribution

Realized Loss Report - Collateral

DEFAULT SPEEDS

TOTAL

MDR

0.00%

3 Months Avg MDR

0.0100%

12 Months Avg MDR

0.02%

Avg MDR Since Cut-off

0.00%

CDR

0.00%

3 Months Avg CDR

0.1000%

12 Months Avg CDR

0.28%

Avg CDR Since Cut-off

0.05%

SDA

0.00%

3 Months Avg SDA Approximation

30.2600%

12 Months Avg SDA Approximation

9.23%

Avg SDA Since Cut-off Approximation

0.3132%

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 August 25, 2005 Distribution

Realized Loss Report for October 25, 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 August 25, 2005 Distribution

Realized Loss Detail Report for October 25, 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 August 25, 2005 Distribution

Additional Certificate Report for October 25, 2005 Distribution

Additional Certificate Report

CLASS

Carryforward Interest

Basis Risk Shortfall Reimbursed

Basis Risk Shortfall

Unpaid Basis Risk Shortfall

0.00

54,~~289~~171.6879

0.00

85,~~026~~320.8963

0.00

~~850~~785.1383

0.00

Page 24 of 24

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