Cal. Evidence Code § 1400 : California Evidence Code — Writings — Authentication And Proof Of Writings — Requirement Of Authentication — "Authentication of a writing" Date: 31 Aug 2016 TEXT PDF Current through the 2016 Legislative Session Authentication of a writing means (a) the introduction of evidence sufficient to sustain a finding that it is the writing that the proponent of the evidence claims it is or (b) the establishment of such facts by any other means provided by law. Ca. Evid. Code § 1400