Cal. RTC § 18670.5

(a) The Franchise Tax Board may by notice, served by magnetic media, electronic transmission, or other electronic technology, require any depository institution, as defined in Section 19 (b) of the Federal Reserve Act (12 U.S.C.A. Sec. 461(b)(1)(A)), that the Franchise Tax Board, in its sole discretion, has reason to believe may have in its possession, or under its control, any credits or other personal property or other things of value, belonging to a taxpayer, to withhold, from the credits or other personal property or other things of value, the amount of any tax, interest, or penalties due from the taxpayer and transmit that amount withheld to the Franchise Tax Board at the times that it may designate, but not less than 10 business days from receipt of the notice. The notice shall state the amount due from the taxpayer and shall be delivered or transmitted to the branch or office reported in the information returns filed with the Franchise Tax Board, or the branch or office where the credits or other property is held, or other address designated by that depository institution for purposes of the Franchise Tax Board serving notice by magnetic media, electronic transmission, or other electronic technology.

(b) Any depository institution failing to withhold the amount due from the taxpayer and to transmit that amount to the Franchise Tax Board after the Franchise Tax Board provides notice to the depository institution as authorized by subdivision (a) shall be liable for those amounts only to the extent that the depository institution can identify the account by magnetic media, electronic transmission, or other electronic technology.

(c) For purposes of this section, the term “address” shall include telephone or modem number, facsimile number, or any other number designated by the depository institution to receive data by electronic means.