This type of transaction is referred to as a “private party transfer” and must be conducted with both parties, in person, through a fully licensed California firearms dealer. Failure to do so is a violation of California law. The purchaser (and seller if the purchaser is denied), must meet the normal firearm purchase and delivery requirements.
Firearms dealers are required to process private party transfers upon request but may charge a fee not to exceed $10 per firearm for conducting the transfer. For example:
For a private party transfer involving one or more handguns, the total allowable fees, including the DROS, safety, and dealer transfer fees, are not to exceed $35.00 for the first handgun and $31.00 for each additional handgun involved in the same transaction.
For private party transfers involving one or more long guns, or a private party transfer involving one handgun, the total allowable fees, including the DROS, safety, and dealer transfer fees, are not to exceed $35.00. The dealer may charge an additional dealer-service fee of up to $10.00 for each additional firearm.
"Antique firearms," as defined in section 921(a)(16) of Title 18 of the United States Code, and curio or relic rifles/shotguns, defined in section 478.11 of Title 27 of the Code of Federal Regulations, that are over 50 years old, are exempt from this requirement.