Ariz. Rev. Stat. § 33-1054
Any person entitled to record a claim of lien under article 6 of this chapter, other than the original contractor, may give to the owner a stop notice. Any person entitled to give a stop notice who fails to serve a stop notice within thirty days after a written demand from the owner forfeits the right to any stop notice on the work described in the demand. A written demand from the owner shall be sent by registered or certified mail, postage prepaid, shall be addressed to that person at any place where that person maintains an office or conducts business and shall include the following language in bold-faced type that is at least as large as the largest type that otherwise appears on the document: "demand for service of stop notice pursuant to A.R.S. section 33-1054 ".
A.R.S. § 33-1054