In your application, you MUST include the number you included in your registration: your OK driver's license number or your OK state ID number or the last 4 digits of your social security number. You can submit multiple numbers, so long as one of them is the correct one.
An affidavit must be notarized with the ballot. If you are a member of the AU community, contact Gwendolyn Reece [greece@american.edu] to set up an appointment to notarize your ballot. You must sign in front of the notary.