Offer and Acceptance. In the state of Arizona, no contract for real estate exists until the contract is offered and accepted in writing (A.How do I submit a bid or proposal? All formal bids and proposals shall be submitted as specified in the solicitation document. Advantageous, or do not Offer the Best Value to Maricopa County, a Contract m a y be entered into through an Invitation to Negotiate. A document that includes an offer, acceptance, and appropriate consideration will be considered legally binding. Completing a Competition Waiver Request Form and returning it to the. For contracts made legally, the breach of contract definition covers all three parts of the contract: the offer, acceptance, and consideration. Offer: An offer can be written or verbal, under Arizona law. This statement presents something for sale, barter, lease, trade, etc.