Cal. COM § 3301

“Person entitled to enforce” an instrument means (a) the holder of the instrument, (b) a nonholder in possession of the instrument who has the rights of a holder, or (c) a person not in possession of the instrument who is entitled to enforce the instrument pursuant to Section 3309 or subdivision (d) of Section 3418. A person may be a person entitled to enforce the instrument even though the person is not the owner of the instrument or is in wrongful possession of the instrument.