Proof of Citizenship Requirements
https://azsos.gov/elections/voting-election/proof-citizenship-requirements
“A person is not required to submit proof of citizenship with the
voter registration form, but failure to do so means the person will only be
eligible to vote in federal elections (known as being a “federal only” voter).
A “federal only” voter will become eligible to vote a “full ballot” in all
federal, state, county and local elections if he or she later provides valid
proof of citizenship to the appropriate County Recorder’s office.”