Cal. RTC § 19005

The tax, and any interest and penalties, shall be paid to the Franchise Tax Board. Except as provided in Section 19011 with respect to an electronic funds transfer, remittances may be in the form of a check, payable in United States funds to the Franchise Tax Board, at the time and in the manner as the Franchise Tax Board may prescribe or, notwithstanding Title 1.3 (commencing with Section 1747) of Part 4 of Title 3 of the Civil Code, in the form of a credit card or other payment device as defined in Chapter 2.6 (commencing with Section 6160) of the Government Code, at the time and in the manner that the Franchise Tax Board may prescribe. If a check or credit card remittance is not paid by the bank on which it is drawn, the taxpayer tendering the check or credit card remittance remains liable for the payment of the tax, and all interest and penalties, as if the check or credit card remittance had not been tendered.