This happened in Roanoke, which is left leaning. Republicans are going all out to cheat in this election.
Edit: Here is the law on tampering with ballots in Virginia. Class 5 felony
https://law.lis.virginia.gov/vacode/title24.2/chapter10/section24.2-1009/
For mail-in, you don’t sign the ballot itself. You sign the envelope, which is used to validate / track who voted, but is then separated from the actual ballot before counting so there’s no way to track who you voted for.
The person who sent the ballot did this. The assholes that want to fuck with the election are actively trying to get these positions.