Tenn. Code Ann. § 23-3-109: Advertised fee as basis for court award for services

Notwithstanding any the law to the contrary, whenever an attorney advertises a fee for a legal service, the advertisement shall be prima facie evidence of the reasonableness of the fee; and no court shall award a fee in excess of the advertised amount unless the attorney proves additional compensation is reasonable under the facts and circumstances of the legal service provided.