US lawArizonaCourt rulesARE — Rules of Evidence for Courts in the State of ArizonaArticle IX. Authentication and Identification903Ariz. R. Evid. 903Rule 903. Subscribing Witness's TestimonyLast amended: 2012Year: 2026Length: 23 wordsOfficial source A subscribing witness's testimony is necessary to authenticate a writing only if required by the law of the jurisdiction that governs its validity.PreviousAriz. R. Evid. 902