It's actually a bit more complicated. My state doesn't require ID to vote, but some do. Some require a full photo ID and others don't. Photo ID is optional at the polls in about half of US states:

https://www.usa.gov/voter-id

Where I live you just show up at the polling place, sign on the line next to your name and address, and that's it. Separately, here's how to vote without ID in California:

https://ballotpedia.org/Voter_ID_in_California