In Arizona, we have a special form called a Pre-Qualification Form. You are legally bound to honor the agreement.Theoretically, you could write an offer on a restaurant napkin but nearly all Arizona home purchase offers are written on pre-made contract forms. These are simple, one-page letters explaining who you are and why this home is the perfect fit for you. Try not to go over three to four paragraphs. Vying for the property. How do you arm yourself in this battle to the death — er, pop-up bidding war? A preapproval letter is an official letter from a lender that provides documentation of exactly how much you are approved to borrow. View form-by-form revisions. Remember, in a real estate transaction, verbal agreements mean nothing!