Cal. Fin. Code § 1632

At any time after the date specified in such notice, if the rental for such safe-deposit box to the date of payment and the cost of giving such notice have not been paid, the bank, in the presence of two of its employees, one of whom shall be an officer of the bank, may cause such box to be opened and the contents thereof to be removed and inventoried. The inventory shall be signed by such persons.