In Arizona, the landlord and tenant relationship is governed by the Arizona Residential Landlord and Tenant Act (A.R.S. Title 33, Chapter 10), which sets out the rights and duties of residents and owners. A guaranty is a separate contract layered on top of the lease. By signing it, the guarantor agrees to be responsible for the resident's covered obligations, most commonly unpaid rent and damage beyond normal wear, up to the limits written into the document. The scope and duration depend on the wording of the guaranty itself, so clear drafting matters. MoveSmart structures guaranties to state plainly what is covered, for how long, and under what conditions the owner may look to the guarantor. We do not provide legal advice, and owners and guarantors are encouraged to review terms with their own counsel. What we do is make sure the arrangement is documented, consistent with the lease, and enforceable on its face. A vague or oral promise offers little protection. A written, verified guaranty aligned with the lease and Arizona law gives the owner something they can rely on if the resident ever defaults.