[yonaguska]

it depends on the state and how thorough their verification system is. I can only speak for IL, but in order to request a mail in ballot, you must be registered to vote first. Even if you register online, you must at minimum provide a DL number or SSN, and the state will associate a signature with your registration. Which is then cross referenced to the signature on your ballot envelope. If you don't have a signature and you try to vote by mail, and in the slim chance your registration is actually approved, you are now a first time non signatures voter, and your mail in ballot will be provisional at best.

This is why many of the election fraud claims focused on lax signature verification of ballots as well as the lax mail in ballot address locations. I feel that IL elections are probably more secure, but only because the state is solidly one party and comically gerrymandered anyways.

But technically, yes, a ballot harvester could send ballots on your behalf if they have enough information about you.