From the Trump GA lawsuit:
Under the state statute, absentee ballots for which signatures don’t match with the ones on file are to be rejected by the election clerks who process them. The rule adopted through the litigation settlement requires clerks who believe a signature is mismatched to find two more election officials to concur with them. If at least one of the two election officials concurs with the clerk, all three official must sign their names on the envelope being rejected.
“The Defendants thus changed the clear statutory procedure for confirming voter identity at the time of voting, so that rather than one poll worker reviewing signatures, a committee of three poll workers is charged with confirming that absentee ballot signatures are defective before rejecting a ballot,” the lawsuit states.
“By designating a committee of three to check mail-in absentee voter identification but having a single poll worker check in-person voter identification, the challenged procedure favors the absentee ballots, treats the absentee voters differently from in-person voters and values absentee votes more than the ballots of in-person voters.”
This is incredibly weak stuff.
Of course in person and absentee signature issues are treated different, because the circumstances are different.
It's not as if someone signs in person, are told their signature doesn't match, and are sent home without voting. I'd be pretty damn certain that they would have options such as re-signing, showing picture ID such as a driver's license, or at worst casting a provisional ballot.
For an absentee ballot there are no such remedies, it's either counted or not.
For the most part, no amelioration is available.
So to add an extra level of protection seems reasonable. Instead of a lone election official discounting a ballot, they have to show it to two others and only counts if both of the others election officials disagree and believe the signature is valid.
That's a pretty minor backup and requires additional people discerning validity.
Which seems a rather positive alternative to a single evaluator.
But in any case all in-person and absentee signature discrepancies will in reality be handled differently. Hell, I'd be pretty sure in practice a lone election official couldn't decide against accepting an in-person voter without a supervisor intervening and approving. Really as a practical matter in-person signatures are glanced at quickly, while absentee ballots get much more scrutiny (because you don't have a person in front of you -- who can re-sign, show other ID, match the general age of the voter, tell you where they live and when they moved there, etc).
Anywho, completely waste of time weak legal argumentation the courts will take little time knocking down.