Ariz. Rev. Stat. § 33-812
A. The trustee shall apply the proceeds of the trustee's sale in the following order of priority:
D. If the trustee elects to deposit the balance of the sale proceeds as prescribed by subsection C of this section, the trustee as plaintiff shall commence a civil action in the superior court in the county in which the sale occurred. The action shall name the applicable county treasurer as the defendant, but the county treasurer has no obligation to respond to the complaint or appear in the action. The trustee shall mail by certified or registered mail, with postage prepaid, a conformed copy of the complaint that displays the filing stamp of the court clerk to the county treasurer and all persons, other than the beneficiary, who are entitled to notice pursuant to section 33-809 and to any other person known by the trustee to have an interest of record in the property at the time of the sale. The conformed copy shall be mailed to all known addresses for those persons who are required to receive notice pursuant to this subsection. The trustee shall incorporate in or attach to the complaint:
1. A copy of any one of the following:
G. Any person with a recorded or other legal interest in the property at the time of the sale may apply for the release of the proceeds by filing an application for distribution in the civil action that was filed by the trustee pursuant to subsection D of this section. The applicant shall mail postage prepaid by any form of mail that requires a signed and returned receipt a copy of the application to the county treasurer and all persons at each of the addresses named on the list of persons that is incorporated in or attached to the complaint and to any other address of the persons that is known to or ascertained by the applicant or the applicant's agent. The mailing of the application to each interested party shall occur within three business days after the filing of the original application with the court. On return of the signed receipt or the undelivered or unclaimed original envelope, the applicant shall file with the court an affidavit that states that the application was mailed to the person and that the application was either:
2. Not received, as evidenced by the returned envelope. The applicant shall attach to the affidavit a copy of the original unopened and undelivered or unclaimed returned envelope. If the returned envelope was marked with a new forwarding address, within ten business days after receipt of the original returned envelope the applicant shall: