Cal. Rev. & Tax. Code § 3806

Except as against actual fraud, the deed is conclusive evidence of compliance with this article and otherwise has the same effect as evidence and as a conveyance as a deed to a private purchaser after sale of tax-deeded property under Chapter 7 (commencing with Section 3691) of this part. When the property is sold under an agreement providing for the resale of the property by the purchasing agent the deed given upon resale shall have the same effect.