Pennsylvania

Some counties are doing it, and others aren't. Some counties are so against ballot curing that there were lawsuits to get the ballots thrown out.

So I'm in Allegheny County and we've had ballot curing in the past 3 elections. The County Board of Elections will receive the ballot envelopes and discover an error on the signature or the date (usually the error is the date). They contact the voter and ask them to come down to the Board of Elections office and "fix" the problem. Almost always the voter has been able to do that before the election day deadline so the ballot gets counted. If the ballot doesn't get cured in time, then it goes into a holding file of provisional or quarantined ballots. Those votes may not get counted later, depending on circumstances.

Other Pennsylvania counties (many are rural) aren't doing this. They're chucking every mailed ballot with incorrect signature or date into quarantine. There are cases where those ballots NEVER get counted at all. In other cases they're treated like provisional ballots. Each County Board does it differently, depending on their Party leadership. Harrisburg should have fixed this problem, but they didn't and now here we are.