Tenn. Code Ann. § 55-3-125: Liens and encumbrances - Filing

No conditional sales contract, chattel mortgage, or other lien or encumbrance or title retention instrument upon a registered vehicle, other than a lien dependent upon possession entered into after March 1, 1951, or a lien of the state for taxes established pursuant to title 67, chapter 1, part 14, shall be valid against the creditors of an owner or subsequent purchasers or encumbrancers, until the requirements of this section and § 55-3-126 have been complied with, unless such creditor, purchaser, or encumbrancer has actual notice of the prior lien.