Exhibit 99(a)(3)

MONTHLY SERVICERS CERTIFICATE

(TO BE DELIVERED EACH MONTH PURSUANT TO SECTION 3.01(b)(i)

OF THE SERIES 2004-1 TRANSITION PROPERTY SERVICING AGREEMENT)

ONCOR ELECTRIC DELIVERY TRANSITION BOND COMPANY LLC,

Series 2004-1 Bonds

Oncor Electric Delivery Company LLC, as Servicer

Pursuant to the Series 2004-1 Transition Property Servicing Agreement dated as of June 7, 2004 (the Series 2004-1 Transition Property Servicing Agreement) between Oncor Electric Delivery Company LLC, as Servicer, and Oncor
Electric Delivery Transition Bond Company LLC, as Issuer, the Servicer does hereby certify as follows:

SERIES 2004-1 COLLECTION PERIOD:
December 2007



|                            |  |                                             |                |                                         |   |                                                        |  |                                                           |              |  |   |             
|--------------------------- |  | ------------------------------------------- | -------------- | --------------------------------------- | - | ------------------------------------------------------ |  | --------------------------------------------------------- | ------------ |  | - | ------------
|Customer Class              |  | a. Series 2004-1Transition Chargesin Effect |                | b. Series 2004-1TransitionChargesBilled |   | c. ActualSeries
2004-1TransitionChargePaymentsReceived |  | d. Series 2004-1TransitionChargeRemittancesMade
toTrustee
|Residential Service         |  | $                                           | 0.000969 / kWh |                                         | $ | 2,618,064.66                                           |  | $                                                         | 2,752,268.69 |  | $ | 2,752,268.69
|General Service Secondary   |  |                                             |                |                                         | $ | 3,152,255.41                                           |  | $                                                         | 3,707,554.71 |  | $ | 3,707,554.71
|Non-demand                  |  | $                                           | 0.000684 / kWh |                                         |   |                                                        |  |                                                           |              |  |   |             
|Demand                      |  | $                                           | 0.264 / kW     |                                         |   |                                                        |  |                                                           |              |  |   |             
|General Service Primary     |  |                                             |                |                                         | $ | 351,830.73                                             |  | $                                                         | 410,386.94   |  | $ | 410,386.94  
|Non-demand                  |  | $                                           | 0.000309 / kWh |                                         |   |                                                        |  |                                                           |              |  |   |             
|Demand                      |  | $                                           | 0.237 / kW     |                                         |   |                                                        |  |                                                           |              |  |   |             
|High Voltage Service        |  | $                                           | 0.143 / kW     |                                         | $ | 263,276.24                                             |  | $                                                         | 258,512.18   |  | $ | 258,512.18  
|Lighting Service            |  | $                                           | 0.001230 / kWh |                                         | $ | 51,537.13                                              |  | $                                                         | 62,561.36    |  | $ | 62,561.36   
|Instantaneous Interruptible |  | $                                           | 0.148 / kW     |                                         | $ | 143,042.75                                             |  | $                                                         | 166,324.26   |  | $ | 166,324.26  
|Noticed Interruptible       |  | $                                           | 0.233 / kW     |                                         | $ | 198,120.58                                             |  | $                                                         | 212,809.54   |  | $ | 212,809.54  
|                            |  |                                             |                |                                         |   |                                                        |  |                                                           |              |  |   |             
|Total                       |  |                                             |                |                                         | $ | 6,778,127.50                                           |  | $                                                         | 7,570,417.68 |  | $ | 7,570,417.68



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Capitalized terms used herein have their respective meanings set forth in the Series 2004-1 Transition
Property Servicing Agreement.

In WITNESS HEREOF, the undersigned has duly executed
and delivered this Monthly Servicers Certificate this 8thday of January, 2008.



ONCOR ELECTRIC DELIVERY COMPANY LLC, as
ServicerBy:

/s/ John M. CaseyName:

John M. CaseyTitle:

Treasurer