California Revenue & Taxation Code
Cal. Rev. & Tax. Code § 3950
Official textleginfo.legislature.ca.gov
Whenever tax-defaulted property has been purchased at tax sale, including purchases made under Chapter 8 (commencing with Section 3771), and all subsequent taxes levied and payable have been paid, the purchaser, or any person claiming through the purchaser, may bring an action to determine adverse claims to or clouds upon that property. The complaint shall be verified and shall aver the matters above enumerated.
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