California Code, Government Code - GOV § 17280.1

(a) A taxpayer who has a tax liability, including any liability for periodic estimated tax payments, with respect to personal income taxes or bank and corporation taxes, and who is a payee named in a registered warrant as defined in Section 17221 which is received in payment of an obligation of the State of California to the taxpayer, may pay any tax liability specified above, in whole or in part, by a check in an amount not to exceed the amount of the registered warrant, exclusive of any interest thereon. That check shall not be presented for payment by the state or paid by the bank on which it is drawn until the registered warrant payable to the taxpayer is payable upon its presentation to the Treasurer. The provisions of this section shall be applicable only if the taxpayer's check in payment of a tax liability pursuant to this section is accompanied by a copy of the registered warrant, as specified above, which clearly discloses the name of the payee, the amount to be paid, the number of the warrant, and the completed and signed legend as provided for in subdivision (d).

(b) Any taxpayer submitting a check for the payment of taxes pursuant to subdivision (a) shall be precluded from receiving interest on his or her registered warrant from the date the check for the payment of taxes is submitted.

(c) In the event that a taxpayer who submits a check for the payment of taxes pursuant to subdivision (a) presents his or her registered warrant to a bank or other institution for payment, the taxpayer shall make a declaration upon presentment that he or she is ineligible pursuant to subdivision (b) to receive interest from the date he or she submitted the check.

(d) To facilitate the taxpayer in making the declaration required by subdivision (c), all registered warrants issued shall bear a legend on the reverse side in substantially the following form:

“In endorsing this warrant, I declare that I have ☐ or have not ☐ (check one) submitted a check on __________(date) for the payment of tax liability in an amount not to exceed the amount of this warrant. I further declare that by submitting that check, I am ineligible for the receipt of interest on this warrant after the above date.”