What identification do I need to bring with me when I vote?

Answer

Missouri's new election law (effective August 2022) requires that you show one of the forms of acceptable identification and sign the poll book to obtain your ballot:

A nonexpired Missouri driver or non-driver license;
A nonexpired military ID, including a veteran’s ID card;
A nonexpired United States passport; or
Another photo ID issued by the United States or the state of Missouri which is either not expired or expired after the date of the most recent general election.

*If the driver or non-driver license has expired after the most recent general election, it is an acceptable form of voter ID.

If you do not possess any of these forms of identification, but are a registered voter, you may cast a provisional ballot.

Your provisional ballot will count if: (1) you return to your polling place on Election Day with a photo ID; or (2) the signature on your provisional ballot envelope is determined by your local election authority to match the signature on your voter registration record.
If you cast a provisional ballot, you will receive a stub from your provisional ballot envelope with instructions on how to verify that your provisional ballot is counted.

Samples of Acceptable Forms of ID: https://www.sos.mo.gov/CMSImages/ElectionGoVoteMissouri/AcceptableFormsVoterID.pdf