Cal. Bus. & Prof. Code § 4404

If any license issued under this chapter is lost or destroyed, or if any person desires a reissuance of his or her license, the board may reissue it, subject to Section 4403, upon application therefor, and the submission of satisfactory proof, if required by the board, that the license has been lost or destroyed, or if the license has not been lost or destroyed, upon the surrender of the old license.