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 2009



|                            |  |                                             |                |                                          |   |                                                        |  |                                                            |              |  |   |             
|--------------------------- |  | ------------------------------------------- | -------------- | ---------------------------------------- | - | ------------------------------------------------------ |  | ---------------------------------------------------------- | ------------ |  | - | ------------
|Customer Class              |  | a. Series 2004-1Transition
Chargesin Effect |                | b. Series 2004-1TransitionCharges
Billed |   | c. ActualSeries
2004-1TransitionChargePaymentsReceived |  | d. Series 2004-1TransitionChargeRemittancesMade to Trustee
|                            |  |                                             |                |                                         
|Residential Service         |  | $                                           | 0.000984 / kWh |                                          | $ | 2,904,465.30                                           |  | $                                                          | 2,322,726.81 |  | $ | 2,322,726.81
|                            |  |                                             |                |                                         
|General Service Secondary   |  |                                             |                |                                          | $ | 3,401,206.85                                           |  | $                                                          | 3,776,547.87 |  | $ | 3,776,547.87
|                            |  |                                             |                |                                         
|Non-demand                  |  | $                                           | 0.000741 / kWh |                                          |   |                                                        |  |                                                            |              |  |   |             
|                            |  |                                             |                |                                         
|Demand                      |  | $                                           | 0.289 / kW     |                                          |   |                                                        |  |                                                            |              |  |   |             
|                            |  |                                             |                |                                         
|General Service Primary     |  |                                             |                |                                          | $ | 404,207.50                                             |  | $                                                          | 454,882.67   |  | $ | 454,882.67  
|                            |  |                                             |                |                                         
|Non-demand                  |  | -$                                          | 0.000294 / kWh |                                          |   |                                                        |  |                                                            |              |  |   |             
|                            |  |                                             |                |                                         
|Demand                      |  | $                                           | 0.281 / kW     |                                          |   |                                                        |  |                                                            |              |  |   |             
|                            |  |                                             |                |                                         
|High Voltage Service        |  | $                                           | 0.170 / kW     |                                          | $ | 182,215.69                                             |  | $                                                          | 201,145.51   |  | $ | 201,145.51  
|                            |  |                                             |                |                                         
|Lighting Service            |  | $                                           | 0.001258 / kWh |                                          | $ | 51,748.27                                              |  | $                                                          | 35,872.12    |  | $ | 35,872.12   
|                            |  |                                             |                |                                         
|Instantaneous Interruptible |  | $                                           | 0.157 / kW     |                                          | $ | 138,941.27                                             |  | $                                                          | 146,080.22   |  | $ | 146,080.22  
|                            |  |                                             |                |                                         
|Noticed Interruptible       |  | $                                           | 0.263 / kW     |                                          | $ | 189,278.16                                             |  | $                                                          | 199,272.00   |  | $ | 199,272.00  
|                            |  |                                             |                |                                          |   |                                                        |  |                                                            |              |  |   |             
|                            |  |                                             |                |                                         
|Total                       |  |                                             |                |                                          | $ | 7,272,063.04                                           |  | $                                                          | 7,136,527.20 |  | $ | 7,136,527.20



---

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 8th day of January, 2010.



ONCOR ELECTRIC DELIVERY COMPANY LLC,as ServicerBy:

/s/ John M. CaseyName:

John M. CaseyTitle:

Vice President and Treasurer