The computer prints a sticker with your ballot#. I was #1157. It will be checked on election day that ballot #1157 was processed. The ballot was placed in a sealed envelope with #1157 on envelope.
About the only risk I can see is if the individual placing the ballots in the machine was to tamper with my ballot. That actual ballot needs to be verified that it was processed. I suppose two things could happen.
1.They were to mark on my ballot(fill in other blanks) thereby nullifying my vote.
2.Throwing it in the trash. This would get noticed but maybe too late after the votes are already counted.
Is there a way the poll worker knows your party affiliation while they handle your ballot?