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How to Resolve Invalid Purchase Order Numbers

Effective January 2, 2024, UCLA transitioned to its new procure-to-pay system, BruinBuy Plus. This web page is actively being updated; however, it still references the legacy BruinBuy system and processes. Review the BruinBuy Plus hub for additional information and resources. 


When you see the hold reason code "PX or the message "Not a valid P.O. (purchase order). P.O. does not exist in our system" on the Hold & Incomplete (H & I) invoice status report in BruinBuy, take the following actions. 

NOTE: This process assumes knowledge of BruinBuy. Please see Chapter 15 of the BruinBuy User Guide for additional information on how to access the INV screen and an explanation of the information presented on this screen.


  1. Review the invoice data on the INV screen in BruinBuy to determine what was purchased. You will need the vendor number and the invoice number to access the information.
  2. If an open, valid P.O. exists for this transaction, provide the valid P.O. number to the Accounts Payable (AP) representative who placed the invoice on "I" (incomplete) status. See Related Information on How to Locate the Correct AP Preparer.
  3. If a valid P.O. does not exist for this transaction, create a new P.O., contact the AP representative who placed the invoice on "I" status and provide the new P.O. number.