Ariz. R. Civ. P. 10

As amended through December 6, 2023
Rule 10 - Form of Pleadings
(a) Caption; Names of Parties. Every pleading must have a caption in the form prescribed by Rule 5.2(a), along with the pleading's designation under Rule 7. The title of the complaint must name all the parties; the title of other pleadings and documents, after naming the first party on each side, may refer generally to other parties by the designation "et al."
(b) Paragraphs; Separate Statements. A party must state its claims or defenses in numbered paragraphs, each limited as far as practicable to a single set of circumstances. A later pleading may refer by number to a paragraph in an earlier pleading. If doing so would promote clarity, each claim founded on a separate transaction or occurrence- and each defense other than a denial-must be stated in a separate count or defense.
(c) Adoption by Reference; Exhibits. A statement in a pleading may be adopted by reference elsewhere in the same pleading or in any other pleading or motion. A copy of a written instrument that is an exhibit to a pleading is a part of the pleading for all purposes.
(d) Using a Fictitious Name to Identify a Defendant. If the name of the defendant is unknown to the plaintiff, the defendant may be designated in the pleadings or proceeding by any name. If the defendant's true name is discovered, the pleading or proceeding should be amended accordingly.

Ariz. R. Civ. P. 10

Amended effective 1/1/2017.