Section 28050 Of Chapter 5. Procedure For A Private Party Firearms Transaction From California Penal Code >> Division 6. >> Title 4. >> Part 6. >> Chapter 5.

. (a) A person shall complete any sale, loan, or transfer of a firearm through a person licensed pursuant to Sections 26700 to 26915, inclusive, in accordance with this chapter in order to comply with Section 27545.
  (b) The seller or transferor or the person loaning the firearm shall deliver the firearm to the dealer who shall retain possession of that firearm.
  (c) The dealer shall then deliver the firearm to the purchaser or transferee or the person being loaned the firearm, if it is not prohibited, in accordance with Section 27540.
  (d) If the dealer cannot legally deliver the firearm to the purchaser or transferee or the person being loaned the firearm, the dealer shall forthwith, without waiting for the conclusion of the waiting period described in Sections 26815 and 27540, return the firearm to the transferor or seller or the person loaning the firearm. The dealer shall not return the firearm to the seller or transferor or the person loaning the firearm when to do so would constitute a violation of Section 27500, 27505, 27515, 27520, 27525, 27530, or 27535. If the dealer cannot legally return the firearm to the transferor or seller or the person loaning the firearm, then the dealer shall forthwith deliver the firearm to the sheriff of the county or the chief of police or other head of a municipal police department of any city or city and county, who shall then dispose of the firearm in the manner provided by Sections 18000, 18005, and 34000.