Here's an article about one of the solutions: https://na.panasonic.com/us/trends/confronting-votings-new-normal-ballot-scanning-and-signature-verification-techn

Here's an article about one of the solutions: https://na.panasonic.com/us/trends/confronting-votings-new-normal-ballot-scanning-and-signature-verification-technology https://na.panasonic.com/us/trends/confronting-votings-new-n... Basically they compare the ballot signature with the one used on your license. Not everybody has a license, so I'm guessing there is more to it than just that. Probably something in regards to the voter registration itself. Also - in the video that RG cites as proof that they counted some ballots more than once, I believe they are actually re-scanning signatures. The machine in the video pretty much looks exactly like the one this article refers to.