Ariz. Rev. Stat. § 14-3203
A. Whether the proceedings are formal or informal, persons who are not disqualified have priority for appointment in the following order:
B. An objection to an appointment can be made only in formal proceedings. In case of objection the priorities stated in subsection A of this section apply, except that:
E. Formal proceedings are required to appoint a personal representative in any of the following situations:
F. A person is not qualified to serve as a personal representative who is: