CA Veh Code § 40504 (2021)
2021 California Code|Vehicle Code - VEH|DIVISION 17 - OFFENSES AND PROSECUTION|CHAPTER 2 - Procedure on Arrests|ARTICLE 2 - Release Upon Promise to Appear|Section 40504.

40504.  (a) The officer shall deliver one copy of the notice to appear to the arrested person and the arrested person in order to secure release must give his or her written promise to appear in court or before a person authorized to receive a deposit of bail by signing two copies of the notice which shall be retained by the officer, and the officer may require the arrested person, if this person has no satisfactory identification, to place a right thumbprint, or a left thumbprint or fingerprint if the person has a missing or disfigured right thumb, on the notice to appear. Thereupon, the arresting officer shall forthwith release the person arrested from custody. Except for law enforcement purposes relating to the identity of the arrestee, no person or entity may sell, give away, allow the distribution of, include in a database, or create a database with, this print.(b) Any person who signs a written promise to appear with a false or fictitious name is guilty of a misdemeanor regardless of the disposition of the charge upon which he or she was originally arrested.(c) (1) A person contesting a charge by claiming under penalty of perjury not to be the person issued the notice to appear may choose to submit a right thumbprint, or a left thumbprint if the person has a missing or disfigured right thumb, to the issuing court through his or her local law enforcement agency for comparison with the one placed on the notice to appear. A local law enforcement agency providing this service may charge the requester no more than the actual costs. The issuing court may refer the thumbprint submitted and the notice to appear to the prosecuting attorney for comparison of the thumbprints. When there is no thumbprint or fingerprint on the notice to appear, or when the comparison of thumbprints is inconclusive, the court shall refer the notice to appear or copy thereof back to the issuing agency for further investigation, unless the court finds that referral is not in the interest of justice.(2) Upon initiation of the investigation or comparison process by referral of the court, the court shall continue the case and the speedy trial period shall be tolled for 45 days.(3) Upon receipt of the issuing agency’s or prosecuting attorney’s response, the court may make a finding of factual innocence pursuant to Section 530.6 of the Penal Code if the court determines that there is insufficient evidence that the person cited is the person charged and shall immediately notify the Department of Motor Vehicles of its determination. If the Department of Motor Vehicles determines the citation or citations in question formed the basis of a suspension or revocation of the person’s driving privilege, the department shall immediately set aside the action.(4) If the prosecuting attorney or issuing agency fails to respond to a court referral within 45 days, the court shall make a finding of factual innocence pursuant to Section 530.6 of the Penal Code, unless the court finds that a finding of factual innocence is not in the interest of justice.(5) The citation or notice to appear may be held by the prosecuting attorney or issuing agency for future adjudication should the arrestee who received the citation or notice to appear be found.(Amended by Stats. 2003, Ch. 467, Sec. 8. Effective January 1, 2004.)