Tenn. Code Ann. § 66-8-109: Advance on redemption price by redeeming creditor

When any such creditor has redeemed land from the original purchaser, or from one who has previously redeemed, that creditor may, within twenty (20) days after such redemption, advance upon the bid any sum to the extent of that creditor's debt or debts, just as if such creditor had been the original purchaser.