Cal. Sts. & Hy. Code § 6508
If at any time prior to the sale any person interested in the lot or parcel of land described in the notice of sale pays the whole amount of the unpaid principal of the bond, the interest thereon compounded semiannually up to the date of such payment, at the rate named in the bond upon the amount of the principal remaining unpaid for the whole period for which interest has not been paid, and all penalties which have accrued, together with the sums specified in Section 6505.1, except for the fee for the issuance of the certificate of sale, the bond shall be canceled. If redemption of the bond is made by the property owner prior to publication of notice of sale, but after the treasurer has incurred any expense for such publication, the property owner shall pay to the treasurer such expense incurred by the treasurer.
Ca. Sts. and High. Code § 6508