This article will address some of the primary legal requirements of a real estate contract and some of the most common questions about contracts. In Arizona (and most other states), an agreement for the sale of real property must be in writing and signed.A contract is formed when there is: 1. When a buyer and seller enter into a purchase contract, each person is agreeing to the conditional exchange of property and funds. The Arizona Department of Real Estate said everything on the document should be negotiable before you sign it. The interest of a purchaser in any personal property included in a contract is subject to forfeiture or foreclosure in the same manner as the real property. The Seller should understand the problems in the Buyer's credit that presumably precluded traditional financing to complete the deal. The general rule under Arizona law is that a buyer's interest in a real estate purchase agreement is freely assignable, absent restrictions or prohibitions. How to properly fill out the Arizona Association of Realtors Resale Purchase Contract using Dotloop. B) Buyer begins completing loan process upon contract acceptance.