Tex. Loc. Gov't Code § 281.079
When a bond, interest coupon, note, or warrant of the authority is paid, it shall be delivered to the authority or destroyed. If a bond, coupon, note, or warrant is destroyed, evidence of the destruction shall be furnished to the board.
Acts 1987, 70th Leg., ch. 149, Sec. 1, eff. Sept. 1, 1987.