The State of Maine has made it easy to make request online!
This site has great Voter Resources, please check them out:
Guide to Absentee Voting in Maine
You May Also:
Change a registration or register for the first time ON-LINE – Online Voter Registration
Change a registration or register for the first time BY MAIL – vrrev124.pdf (maine.gov) -A NEW Maine voter must include a photocopy of your Maine driver’s license, Maine State ID, or current utility bill, bank statement or government document that shows your name and address, id mailing
Change a registration or register for the first time IN PERSON at Town Hall