Tennessee Code Title 66. Property § 66-11-111

Where the lienor's contract is in writing, and has been acknowledged, or in lieu of acknowledgment is sworn to by the prime contractor as to its execution by the owner, it may be recorded in the lien book in the register of deeds of the county where the real property, or any part of the affected real property, lies. Subsequent purchasers or encumbrancers for value shall be deemed to have notice of the lien so long as the recorded contract sets forth the contract price and describes the real property with reasonable certainty.