Tenn. Code Ann. § 8-19-115

Official bonds, including blanket bonds, and each rider or attachment thereto, required by law to be filed in the office of the county clerk or secretary of state, shall be filed therein within forty (40) days after the election or appointment of the principal named on the bond, rider, or attachment, or within twenty (20) days after the term of the office legally begins. In all other cases, such bonds shall be filed in the proper office within thirty (30) days after such election or appointment, or within ten (10) days after the term of office legally begins.