California Code, Revenue and Taxation Code - RTC § 23304.1

(a) Every contract made in this state by a taxpayer during the time that the taxpayer's powers, rights, and privileges are suspended or forfeited pursuant to Section 23301, 23301.5, or 23775 shall, subject to Section 23304.5, be voidable at the request of any party to the contract other than the taxpayer.

(b) If a foreign taxpayer that neither is qualified to do business nor has an account number from the Franchise Tax Board, fails to file a tax return required under this part, any contract made in this state by that taxpayer during the applicable period specified in subdivision (c) shall, subject to Section 23304.5, be voidable at the request of any party to the contract other than the taxpayer.

(d) If a taxpayer fails to file a tax return required under this part, to pay any tax or other amount owing to the Franchise Tax Board under this part or to file any statement or return required under Section 23772 or 23774, within 60 days after the Franchise Tax Board mails a written demand therefor, any contract made in this state by the taxpayer during the period beginning at the end of the 60-day demand period and ending on the date relief is granted under Section 23305.1, or the date the taxpayer qualifies to do business in this state, whichever is earlier, shall be voidable at the request of any party to the contract other than the taxpayer. This subdivision shall apply only to a taxpayer if the taxpayer has an account number from the Franchise Tax Board, but has not qualified to do business under the Corporations Code. In the case of a taxpayer that has not complied with the 60-day demand, the taxpayer's name, Franchise Tax Board account number, date of the demand, date of the first day after the end of the 60-day demand period, and the fact that the taxpayer did not within that period pay the tax or other amount or file the statement or return, as the case may be, shall be a matter of public record.