Cal. Gov. Code § 9360

No payment shall be made to persons included in any group if at the date of payment there are living persons in any of the groups preceding it, as listed. Payment to the persons in any group, upon receipt from them of an affidavit upon a form supplied by the board, that there are no living individuals in the groups preceding it and that the estate of the deceased will not be probated, is in full discharge of the board and system on account of the death.