Ace Sec Corp Wells Fargo Financial Auto Owner Trust 2004-a 8-K Other Events

Exhibit 20

Wells Fargo Financial Auto Owner Trust 2004-A
Class A-1 1.0725% Asset Backed Notes
Class A-2 1.47% Asset Backed Notes
Class A-3 2.06% Asset Backed Notes
Class A-4 2.67% Asset Backed Notes
Servicer’s Certificate

This Servicer’s Certificate has been prepared pursuant to Section 4.9 of the Sale and Servicing Agreement dated as of March 1, 2004 among Wells Fargo Financial Auto Owner Trust 2004-A, as Issuer,  Wells Fargo Financial,  Inc., as Master Servicer,  ACE Securities Corp. and JPMorgan Chase Bank as Indenture Trustee. Defined terms have the meanings assigned to them in the Sale and Servicing Agreement or in other Transaction Documents.

		Original Pool
Monthly Period Beginning:	09/01/2004				Original
Monthly Period Ending:	09/30/2004	Units	Cut-off Date	Closing Date	Pool Balance
Previous Distribution/Close Date:	09/15/2004	46,042	02/29/2004	03/11/2004	751,885,625
Distribution Date:	10/15/2004
Actual Days of Interest for Period:	30
30/360 Days of Interest for Period	30
Days in Collection Period:	30
Months Seasoned:	7

I.	MONTHLY PERIOD RECEIVABLES PRINCIPAL BALANCE CALCULATION:
{1}	Beginning of period Pool Balance				{1}	617,461,350
	Monthly Principal Amounts
	{2}	Collections on Receivables outstanding at end of period	{2}	8,307,263
	{3}	Collections on Receivables paid off during period	{3}	9,791,964
	{4}	Receivables becoming Defaulted Receivables during period	{4}	5,688,059
	{5}	Receivables becoming Repurchased Receivables during period	{5}	0
	{6}	Other Receivables adjustments	{6}	0
	{7}	Interest and Other Fees	{7}	8,023,863
	{8}	Total Monthly Principal Amounts			{8}	23,787,286
{9}	End of period Pool Balance				{9}	593,674,064
{10}	Pool Factor ( {9} / Original Pool Balance)				{10}	78.9580282%

II.	MONTHLY PERIOD NOTE/CERTIFICATE BALANCE CALCULATION:
			Class A-1	Class A-2	Class A-3	Class A-4	Certificate	TOTAL
{11}	Original Balance	{11}	144,000,000	113,000,000	128,000,000	115,000,000	251,879,699	751,879,699
{12}	Beginning of period balance	{12}	29,913,344	113,000,000	128,000,000	115,000,000	193,695,046	579,608,390
{13}	Regular Principal Distribution Amount	{13}	0	0	0	0		0
{14}	Accelerated Principal Distribution Amount	{14}	14,867,054	0	0	0		14,867,054
{15}	Excess Cash Flow payable to Certificateholders	{15}					11,897,018	11,897,018
{16}	End of period balance	{16}	15,046,290	113,000,000	128,000,000	115,000,000	181,798,028	552,844,317
{17}	Note/Certificate Pool Factors ( {16} / {11} )	{17}	10.4488125%	100.00%	100.00%	100.00%	72.18%	73.53%

III.	CALCULATION OF REGULAR PRINCIPAL DISTRIBUTABLE AMOUNT
{18}	End of period Pool Balance	{18}	593,674,064
{19}	Beginning of period Class A Note Balance	{19}	385,913,344
{20}	Pro Forma Class A Note Balance ( 66.50% x {18} )	{20}	394,793,252
{21}	Pro Forma Regular Principal Distribution Amount ( {19} - {20} )	{21}	0
{22}	Current Payment Date equal to a Final Scheduled Payment Date	{22}	No
{23}	If {22} is Yes, amount of Beginning of Period Note Balance for such class.  If {22} is No, then 0	{23}	0
{24}	Regular Principal Distributable Amount {Max (Line 21, Line 23)}	{24}		0

IV.	CALCULATION OF ACCELERATED PRINCIPAL DISTRIBUTABLE AMOUNT
{25}	End of period Pool Balance	{25}	593,674,064
{26}	Beginning of period Class A Note Balance	{26}	385,913,344
{27}	Pro Forma Class A Note Balance (62.50% x Line 26)	{27}	371,046,290
{28}	Pro Forma Accelerated Principal Distribution Amount ( {26} - [27} )	{28}	14,867,054
{29}	Regular Principal Distribution Amount ( {24} )	{29}	0
{30}	Accelerated Principal Distributable Amount ( {28} - {29} )	{30}		14,867,054

V.

RECONCILIATION OF COLLECTION ACCOUNT:

Available Funds:

{31}

Collections on Receivables during period (net of Liquidation Proceeds and Fees)

{31}

25,927,842

{32}

Liquidation Proceeds collected during period

{32}

2,017,128

{33}

Repurchase Amounts deposited in Collection Account

{33}

0

{34}

Investment Earnings - Collection Account

{34}

0

{35}

Investment Earnings - Reserve Account

{35}

13,768

{36}

Collection of Supplemental Servicing - Extension Fees, Late Fees, Repo and Recovery Fees Advanced

{36}

195,247

{37}

Amounts from the Reserve Account in excess of the Reserve Account Required Amount ( {71} )

{37}

475,746

{38}

Reserve Account Transfer Amount ( {76} )

{38}

0

{39}

Total Available Funds

{39}

28,629,732

Distributions:

{40}

Base Servicing Fee (2.00%) -  to Servicer

{40}

1,029,102

{41}

Supplemental Servicing Fee - to Servicer

{41}

195,247

{42}

Indenture Trustee and Owner Trustee Fees

{42}

542

Noteholders’ Interest Distribution Amount

Class

Beginning Note Balance

Interest Carryover

Interest Rate

Days

Days Basis

Calculated Interest

{43}

Class A - 1

$29,913,344

0

1.07250%

30

Actual days/360

26,735

{43}

26,735

{44}

Class A - 2

113,000,000

0

1.47000%

30

30/360

138,425

{44}

138,425

{45}

Class A - 3

128,000,000

0

2.06000%

30

30/360

219,733

{45}

219,733

{46}

Class A - 4

115,000,000

0

2.67000%

30

30/360

255,875

{46}

255,875

{47}

Available Funds Subtotal ( {39} - {40 to 46} )

{47}

26,764,072

1

Noteholders’ Regular Principal Distribution Amount

Class

Principal Distributable

TotalPrincipal

{48}

Class A - 1

0

0

{48}

0

{49}

Class A - 2

0

0

{49}

0

{50}

Class A - 3

0

0

{50}

0

{51}

Class A - 4

0

0

{51}

0

{52}

Total Regular Principal Distribution Amount distributions

{52}

0

{53}

Available Funds Subtotal ( {47} - {52} )

{53}

26,764,072

{54}

Deposit to the Reserve Account to achieve the Reserve Account Required Amount

{54}

0

{55}

Available Funds Subtotal ( {53} - {54} )

{55}

26,764,072

Noteholders’ Accelerated Principal Distribution Amount

Class

Principal Distributable

TotalPrincipal

{56}

Class A - 1

14,867,054

$14,867,054

{56}

14,867,054

{57}

Class A - 2

0

0

{57}

0

{58}

Class A - 3

0

0

{58}

0

{59}

Class A - 4

0

0

{59}

0

{60}

Total Noteholders’ Accelerated Principal Distribution Amount

{60}

14,867,054

{61}	Available Funds Subtotal ( {55} - {60} )	{61}	11,897,018
{62}	Additional amounts to the Indenture Trustee and Owner Trustee	{62}	0
{63}	Released to the Certificateholder	{63}	11,897,018
{64}	Released to Residual Interest holder	{64}	0

VI.	RECONCILIATION OF RESERVE ACCOUNT:
	{65}	End of period Pool Balance	{65}	593,674,064
	{66}	Reserve Account Target (2.0% x {65} )	{66}	11,873,481
	{67}	Reserve Account Floor	{67}	11,278,284
	{68}	Outstanding Principal Balance of Notes	{68}	552,844,317
	{69}	Requisite Amount of Reserve Account	{69}	11,873,481
	{70}	Beginning of Period Reserve Account Balance	{70}		12,349,227
	{71}	Reserve Account Balance in excess of requisite amount	{71}	475,746
	{72}	Reserve Fund Balance after excess is released	{72}		11,873,481
	{73}	Reserve Account Shortfall	{73}	0
	{74}	Total Required Payment ( {24} + {40 to 46} )	{74}	1,865,660
	{75}	Available Funds {31 to 37}	{75}	28,629,732
	{76}	Reserve Account Transfer Amount	{76}		0
	{77}	Amounts Deposited to Reserve Acccount	{77}	0
	{78}	End of Period Reserve Fund Balance	{78}		11,873,481

VII.	STATISTICAL DATA:  (CURRENT AND HISTORICAL)
			Original	Current
{79}	Weighted Average APR of the Receivables	{79}	16.16%	16.64%
{80}	Weighted Average Remaining Term of the Receivables	{80}	57.72	51.60
{81}	Weighted Average Original Term of Receivables	{81}	67.89
{82}	Aggregate Realized Losses	{82}	0	11,772,303

VIII.		DELINQUENCY:
Receivables with Scheduled Payment delinquent				Units			Dollars		Percentage
{83}	31-60 days		{83}	2,054			30,851,912		5.20%
{84}	61-90 days		{84}	818			12,506,445		2.11%
{85}	over 90 days		{85}	972			14,232,974		2.40%
{86}	Receivables with Scheduled Payment delinquent more than 30 days at end of period		{86}	3,844			57,591,332		9.70%
IX.	CUMULATIVE NET LOSS RATE
Cumulative Net Loss Rate
{87}	Receivables becoming Liquidation Receivables during period				{87}	5,688,059
{88}	Liquidation Proceeds collected during period				{88}	2,017,128
{89}	Net Losses during period ( {87} - {88} )				{89}	3,670,931
{90}	Net Losses since Initial Cut-off Date (Beginning of Period)				{90}	5,137,822
{91}	Cumulative Net Loss Rate ( ( {89} + {90} ) / {92} )				{91}			1.1716%
{92}	Original Pool Balance				{92}	751,885,625

Prepared By:	Wells Fargo Financial, Acceptance, Inc (the subservicer)
Name:	Dean Anderson
Title:	Vice President
Date:	10/15/2004

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