Cal. Welf. & Inst. Code § 826.6

(a) Any minor who is the subject of a petition that has been filed in juvenile court to adjudge the minor a dependent child or a ward of the court shall be given written notice by the clerk of the court upon disposition of the petition or the termination of jurisdiction of the juvenile court of all of the following:
1. (1) The statutory right of any person who has been the subject of juvenile court proceedings to petition for sealing of the case records.
2. (2) The statutory provisions regarding the destruction of juvenile court records and records of juvenile court proceedings retained by state or local agencies.
3. (3) The statutory right of any person who has been the subject of juvenile court proceedings to have his or her juvenile court record released to him or her in lieu of its destruction.
(b) In any juvenile case where a local welfare department, probation department, or district attorney is responsible for notifying the minor of the dismissal, release, or termination of the case, the agency shall provide written notice to the minor of the information specified in subdivision (a) upon the dismissal, release, or termination of the case.
(c) A written form providing the information described in this section shall be prepared by the clerk of the court and shall be made available to juvenile court clerks, probation departments, welfare departments, and district attorneys.