Chapter: 8000
Section: 8034.1
For checks, warrants, money orders, and other negotiable instruments that are to be physically deposited, agencies/departments shall endorse the items on the day they are received to prevent them from being negotiated or endorsed by someone other than the agency/department.
Endorsements shall ...
https://www.dgs.ca.gov/Resources/SAM/TOC/8000/8034-1