Oklahoma Election Center
As always, it's best to double check with your state for any recent changes to election rules: Oklahoma Election Website
To register in Oklahoma you must:
Any registered Oklahoma voter may apply for an absentee ballot and vote by mail.
If you are voting in person in Oklahoma, you must present one of the following forms of ID at the time you vote:
If you've voted in Oklahoma before, registered in person, or provided ID at the time of registration, you don't need to provide ID to vote by mail.
If you're voting in Oklahoma for the first time, registered to vote by mail, and didn't provide ID when you registered, be sure to enclose a copy of your photo ID, or a current utility bill, bank statement, government check, paycheck, or government document that shows your name and address when you return your ballot.