Ariz. Rev. Stat. § 6-1008
In the event only one lessee is named in the lease of a repository and the lessee dies, or on the death of last surviving lessee under a tenancy in two or more names, the repository may be opened by two employees of the lessor in the presence of any person who presents himself and claims to be interested in the contents. The employees may remove any document which appears to be of a testamentary nature and deliver it to any person named in the document as executor or to a clerk of the superior court. The employees may also remove any policies insuring the life of the deceased lessee and deliver them to the beneficiaries named in the policies. All other contents of the repository shall be retained by the lessor and shall be delivered only to the person legally entitled to them.
A.R.S. § 6-1008