California Code, Revenue and Taxation Code - RTC § 20564

(a) If a lien for the assistance fiscal year has been acquired against the property, or, in the case of a mobilehome, against the certificate of title, of the claimant by reason of the claimant's use of a certificate of eligibility which was paid pursuant to Chapter 6 (commencing with Section 16180) of Part 1 of Division 4 of Title 2 of the Government Code, the net payment otherwise due such claimant shall first be applied by the Controller to reduce the obligation secured by such lien.

(b) If a lien has been reduced as provided in subdivision (a) and the Franchise Tax Board subsequently determines that the assistance allowed for such year was erroneous, the Franchise Tax Board shall notify the Controller who will make an appropriate adjustment to the lien.