Cal. Pub. Resources Code § 7553
When the original patent to swamp and overflowed land of the State has been lost or destroyed, and is not of record in the county where the land is situate, and no duplicate or copy thereof is in the office of the Secretary of State or in the office of the commission, a patent shall be issued to the original purchaser for the same land, as other patents are issued, when it is proven to the satisfaction of the commission from the data in the office of the Secretary of State, or in the office of the commission, that an original patent has been lawfully issued to the original purchaser, and from other satisfactory proof that it has been lost or destroyed, and is not of record in the recorder's office of the county in which the land is situate. The patent so reissued shall have the same force and effect as the original patent, and shall contain the clause "This patent is issued to take the place of the original patent issued for the same land, on the (give date of original patent, and by whom issued), and is not intended to change the title of the persons in whom the land is now vested and only to complete the record title from the State of California." The commission shall collect the same fee therefor as in issuing original patents.
Ca. Pub. Res. Code § 7553