Tennessee Code Title 39. Criminal Offenses § 39-13-315

(a) A person commits the offense of advertising commercial sexual abuse of a minor if the person knowingly sells or offers to sell an advertisement that would appear to a reasonable person to be for the purpose of engaging in what would be a commercial sex act, as defined in § 39-13-301, with a minor.

(c) In a prosecution under this section, it is not a defense that the defendant did not know the age of the minor depicted in the advertisement. It is a defense, which the defendant must prove by a preponderance of the evidence, that at the time of the offense, the defendant made a reasonable bona fide attempt to ascertain the true age of the minor appearing in the advertisement by requiring, prior to publication of the advertisement, production of a driver license, marriage license, birth certificate, or other governmental or educational identification card or paper of the minor depicted in the advertisement and did not rely solely on oral or written allegations of the minor's age or the apparent age of the minor.