Ariz. Admin. Code § R2-16-304
The Office shall not investigate an anonymous complaint. If the Office receives facts from an anonymous source that are compelling and can be reasonably independently verified, the Office may investigate the matter if it is within the scope of A.R.S. § 41-1377.
Adopted under an exemption from the Administrative Procedure Act pursuant to Laws 1995, Ch. 281, Section 5; effective October 30, 1996 (Supp. 96-4). Amended by final rulemaking at 12 A.A.R. 1372, effective June 4, 2006 (Supp. 06-2).