evidence: States verify mailed ballots in different ways. For example, Alabama requires a copy of the voter’s ID to be included and either two witnesses older than 18 or a notary public must sign the envelope in addition to the voter. In Maine, a signature by the voter on the envelope is compared to the signature on the absentee ballot application. Likewise, Colorado uses bipartisan teams who compare the signature on every ballot to ones the state has on file for every registered voter.