An unknown number of San Mateo County Vote by Mail ballots were among mail stolen from a Daly City post office, Chief Elections Officer Mark Church's office said Oct. 15 after being notified of the theft on Oct. 14.

The U.S. Postal Inspection Service is investigating. The county said it is working with USPS and that ballot-processing safeguards ensure only one ballot per voter is counted.

What voters should do

Questions: [email protected] or (650) 312-5222. Related: Election 2026 hub.