This modification allows us to send an acknowledgment receipt and copy of filed image. Fill out the entire form.â–¡ Change from previous Data Form dated . Please take a moment to acknowledge receipt of the attached bid documents. (a) Specify the final date for receipt of requests for a complete bid set;. The UM Public Purchasing Portal is where you set up an account with the university and respond to the bid opportunities listed on this page. From the GSAAuctions. Gov homepage, click on "Register". 4) Click Go. Page 14.