California CodesEvidence CodeDivision 5 - BURDEN OF PROOF; BURDEN OF PRODUCING EVIDENCE; PRESUMPTIONS AND INFERENCESChapter 3 - Presumptions and InferencesArticle 3 - Presumptions Affecting the Burden of Producing Evidence§ 640§ 640Enacted by Stats. 1965, Ch. 299.A writing is presumed to have been truly dated.Cite this sectionCal. Evid. Code § 640 (2026)Copyhttps://ca.codecond.com/codes/evid/division-5-burden-of-proof-burden-of-producing-evidence-presumptions-and-inferences/chapter-3-presumptions-and-inferences/article-3-presumptions-affecting-the-burden-of-producing-evidence/section-640CopyOther sections in Article 3 - Presumptions Affecting the Burden of Producing Evidence§ 630§ 631§ 632§ 633§ 634§ 635§ 636§ 637§ 638§ 639§ 640§ 641§ 642§ 643§ 644§ 645§ 645.1§ 646§ 647← § 639§ 641 →