Ariz. Rev. Stat. § 48-2068
B. The notice shall serve for all assessments in the sanitary district due on the date specified in the notice and shall be substantially in the following form:
Notice of special assessments
due on improvements
All persons owning property heretofore assessed for improvements will take notice that an installment of ________________ becomes due and payable on or before the _______ day of ____________________, 19_____, and if not so paid on or before such date the same will become delinquent and a ten per cent penalty will be added to the amount thereof.