Make sure your signature hasn't changed. I started voting absentee about forty years ago. After signing stacks of checks for years I realized my signature had morphed. I went to the co. elections office and had them pull the old signature card. Sure enough, there was no resemblance. It probably resulted in years of ballots being thrown out. Also, don't mail your ballot if you can avoid it. Hand carry it to a collection point, mail it and it goes through many more hands. This one counts.