Cal. Civ. Proc. Code § 1953.10

Any person, corporation, copartnership, organization, institution, business, member of profession or calling interested in establishing the existence, substance, genuineness, or authenticity of any memorandum, book, map, chart, manuscript, writing, account, entry, record, print, document, representation, or combination thereof that has been damaged, rendered wholly or partially illegible, destroyed in whole or in part or lost by explosion, conflagration, earthquake, disaster or other public calamity, may apply by duly verified petition to the court for an order establishing, reciting, or declaring the existence, substance, genuineness or authenticity of the same.