Vendor Information

Purchasing Method

UOSA Purchasing seeks competition whenever possible in order to provide the best value to the organization. Depending on the purchase requirements and dollar value threshold the Purchasing department may seek informal competition by simply requesting multiple quotes via email, telephone or fax or may utilize a formal competition method such as an Invitation for Bid (IFB) or Request for Proposal (RFP) where a formal, sealed Bid or Proposal is requested. More information regarding UOSA’s purchasing methods and guidlines can be found in the links below.


UOSA is exempt from Federal, State, and local sales and use taxes. Tax Exempt ID# 54-0902952


Delivery information can be found here: UOSA Shipping and Receiving


Unless otherwise agreed upon, payment terms are Net-30 days after receipt of a valid invoice at the UOSA Accounts Payable Department. Invoices must include the Contract or Purchase Order number and an itemization of goods provided and/or services rendered. Invoices included pre-payed shipping charges must provide carrier receipt. Invoices lacking sufficient detail will be returned or payment delayed until such information is provided. The 30 day payment deadline will be construed as beginning on the date that required supporting documentation is provided. All invoices should be addressed to UOSA Accounts Payable Department 14631 Compton Rd, Centreville, VA 20110.

Vendor Registration

Vendors are not required to formally pre-register in order to do business with UOSA. Although registration is not required, vendors may register with UOSA in order to advertise their goods and services and indicate their interest in doing business with UOSA. A registration form, which can be downloaded and filled out, is provided below.

Vendor Registration Form

The completed form may be emailed to or you may submit this Online Version

Authority to Transact Business in Virginia

Effective July 1, 2010, the Code Of Virginia required that to be eligible for award, any bidder or offeror organized as a stock or non-stock corporation, limited liability company, business trust, or limited partnership or registered as a registered limited liability partnership must be authorized to transact business in the Commonwealth of Virginia as a domestic or foreign business entity if so required by Title 13.1 or Title 50 of the Code of Virginia or as otherwise required by law.

Code of Virginia § 2.2-4311.2
Virginia SCC Foreign Business Entity FAQ


Please see documentation links below for detailed information:

Doing Business with UOSA

Procurement Methods Guidelines

Terms, Conditions, and Instructions to Vendors