How do I submit a bid or proposal? All formal bids and proposals shall be submitted as specified in the solicitation document.Form-Invitation-to-Bid-Proposal-Checklist.doc. Official Seal of the State of Arizona. Contact. Arizona Department of Housing. This document is a quick-reference guide for suppliers who would like to submit a response to a solicitation via the APP Supplier Portal. Obtain a Surety Bond. The ADOT construction contract you are bidding likely requires a surety bid bond or other proposal guaranty. The prices extensions and totals have been checked. (Unit prices will prevail. To gain access to valuable information for obtaining bids, specifications, state-of-the-art advancements, product improvements, as well as resolving issues.