My state (republican trifecta) requires a signature at the polling place that matches your voter registration card or photo ID card. I assume they can audit these if there’s a question.

Most people think specifically of photo ID when they see this. In Oklahoma (republican trifecta), you have options, including your voter registration card. I’m assuming there are variations in other states, as well. https://oklahoma.gov/elections/voters/proof-of-identity.html