Tenn. Code Ann. § 39-16-706: Irregularity in oath

It is no defense to prosecution for perjury or aggravated perjury that:

(1) The oath was administered or taken in an irregular manner, or that there was some irregularity in the appointment or qualification of the person who administered the oath; or

(2) The document was not sworn to if the document contained a recital that it was made under oath, the defendant knew or should have known of the recital when the defendant signed the document, and the document contained the signed jurat of a public servant or notary public authorized to administer oaths.