Cal. Civ. Proc. Code § 701.660

When the purchaser of an interest in real property pays the amount due to the levying officer, including any amount required to be paid as a documentary transfer tax pursuant to Section 11911 of the Revenue and Taxation Code, the levying officer conducting the sale shall execute and deliver a deed of sale to the purchaser, record a duplicate of the deed of sale in the office of the county recorder, and forward to the county or city and county any documentary transfer tax paid by the purchaser.