Southwestern Power Administration

Payment to Vendors

In order to promote electronic government (e-gov) as outlined in the President's Management Agenda, Southwestern makes payment to vendors using:

    1. Tax Exempt Government Visa Purchase Card; or

    2. Automated Clearing House (ACH)/Direct Deposit.

All vendors that conduct business with Southwestern must be registered (including their banking information) in the System for Award Management (SAM). This registration must be completed before the award of a contract or the payment for goods and services. Southwestern will obtain and use banking information from the SAM database only to update our vendor database records. It is the responsibility of the vendor to notify Southwestern when a change has occurred in SAM.

Invoices for payment should be submitted to Cash Management by any of the following methods:

    1. Faxed to: 918-295-6529;

    2. Emailed to:; or

    3. Mailed to: Southwestern Power Administration
One West Third Street
Tulsa, OK 74103-3502

For more information or to obtain assistance with arranging payment, contact Southwestern’s Cash Management team at 918-595-6645 or 918-595-6653 or use the link below to send an e-mail.