California has a provisional voting process to handle voters whose eligibility to vote cannot be determined at the polling place.

Reasons for provisional voting
- The voters name is not listed on the Roster of Voters at the precinct.
- The voter has moved within the county but did not re-register to vote.
- The voter whose name is listed on the Roster of Voters as receiving a Vote by Mail Ballot but, for whatever reason, is unable to surrender it.
- The voter is listed on the Roster of Voters and is required to show proof of identification for being a First Time Federal Election Voter but is unable to show proof.


