The California Department of Public Health (CDPH) is responsible for certified copies of a marriage certificate that can typically be used as proof of marriage and or other legal purposes. A certified marriage certificate copy can be used to obtain identification for a person named on the certificate, whereas a certified informational copy can't be used. Some Certified Informational Copies will have signatures and Social Security numbers removed depending on the year of the event.
California Marriage Certificate Steps to Obtain Marriage Certificate
California Department of Public Health
Vital Records - MS 5103
P.O. Box 997410
Sacramento, CA 95899-7410