Cal. Rev. & Tax. Code § 19712

Any tax preparer, as defined in subdivision (b) of Section 19169, who endorses or otherwise negotiates (directly or through an agent) any warrant made in respect of the taxes imposed by Part 10 (commencing with Section 17001) or Part 11 (commencing with Section 23001) which is issued to a taxpayer (other than the tax preparer) shall, in addition to other penalties provided by law, be guilty of a misdemeanor, and upon conviction thereof, shall be fined not more than one thousand dollars ($1,000) or imprisoned not more than one year, or both, together with the costs of prosecution.

This section shall not apply where the tax preparer has advanced the taxpayer an amount of money equal to or greater than the amount of the taxpayer’s tax refund.