Welfare and Institutions Code § 752
ARTICLE 19. Wards—Transfer of Cases Between Counties
Whenever a case is transferred as provided in Section 750, a certified copy of the file may be made and forwarded to the county where the person resides and shall include the name and address of the legal residence of the parent or guardian of the minor. A certified copy shall be deemed to be the same as the original. The original court file may be kept in the files of the transferring county.