A sheriff or other ministerial officer is justified in the execution of, and shall execute all process and orders regular on their face and issued by competent authority, whatever may be the defect in the proceedings upon which they were issued.
A.R.S. § 11-447
Service of process regular on its face
Official source: Arizona State Legislature. Reproduced from public-domain Arizona statutes; confirm against the official source for the current text. Not legal advice.