First off, make sure you qualify. To register to vote in Alabama:
If you have a valid Alabama Driver’s License or Non-Driver’s Identification card:
Fill out this form and mail it to your Absentee Election Manager with a copy of your valid state identification.
Make sure you remember:
Make sure you’ve already submitted your application.
As long as you’ve done this you’ll receive the ballot in the mail with a plain envelope, an envelope that needs signed (the affidavit envelope), and a preaddressed envelope.
To make sure your vote is legitimate, the State of Alabama needs either two other people (witnesses) to sign the envelope or needs the envelope notorized.
If you have two friends, great. Have them sign it.
If not, you can search for a notary — most UPS stores also offer notary services.
You must register to vote by Monday, October 19th
You should mail in your absentee ballot application by Thursday, October 22nd — your local Absentee Election Manager needs to receive your application by Thursday, October 29th.
You should return your actual absentee ballot as soon as possible — it must be received by noon on Wednesday, November 3rd.