Oak Ridge National Laboratory

Accounts Payable


Working with ORNL Accounts Payable

Vendor Account Status System (VASS)

The AP Department implemented the VASS automated system to assist vendors and other AP customers with questions concerning payment activity. Information on the system is available 24 hours a day and can be accessed by calling 865-241-4151 or using the VASS system. The system provided instructions, options and the purchase order number is required to access payment information.

IRS Tax Forms

As a withholding agent for the United States Income Tax, UT-Battelle is required to withhold United States Income Tax from certain payments unless an exemption applies to the payment.  Additionally, Internal Revenue Service requires us to annually report such withholdings and exemptions.  Please complete the applicable form using the links below.  Payment may be withheld pending receipt of the form.

Domestic Vendor

  • W-9 Form Request for Taxpayer Identification Number and Certification

E-mail completed W-9 Form to aptax@ornl.gov or fax to 865-241-9916


 Foreign Vendor

Other forms in the W8 series are available. If a certified (by the U.S. government) exempt company or a company with ECI (effectively connected income) is involved, please contact aptax@ornl.gov for the proper form.

E-mail completed form to aptax@ornl.gov or fax to 865-241-9916

Form W-8BEN-E Short
   Certificate of Entities Status of Beneficial Owner for United States Tax Withholding and Reporting (Entities)(Modified)

Modified W-8BEN-E form to be used for foreign vendors where commercial item purchase orders or service purchase orders where no work will be performed on U.S. soil are to be issued.  This form is used only to establish the entity as non U.S.  Do not use this form for foreign software vendors.

Please request a copy of this form from Shannon Harkleroad at aptax@ornl.gov.