If you submit a request for a birth record to the California Vital Records Office, you may receive a certified document called a Certificate of No Public Record (CNPR). This is simply an official document stating that a record could not be found with the information provided on the submitted application.
This may be because the information on the application was incorrect, or a record does not exist for the individual. However, keep in mind that even if a record cannot be found, the California Department of Public Health-Vital Records (CDPH-VR) will not reimburse your payment for the processing fees.