Cal. Civ. Code § 1786.60

Notwithstanding subdivision (a) of Section 1798.85, prior to July 1, 2004, any financial institution may print the social security number of an individual on any account statement or similar document mailed to that individual, if the social security number is provided in connection with a transaction governed by the rules of the National Automated Clearing House Association, or a transaction initiated by a federal governmental entity through an automated clearing house network.