Tex. Educ. Code § 109.154
(d) The highest bidder shall pay to the board on the day of the sale 25 percent of the bonus bid, and the balance of the bid shall be paid within 24 hours after the bidder is notified that the bid has been accepted. Payments shall be made in cash, certified check, cashier's check, or electronic payment, as the board directs. The failure of the bidder to pay the balance of the amount bid will forfeit to the board the 25 percent of the bonus bid paid.
Acts 2015, 84th Leg., R.S., Ch. 1173 (S.B. 907), Sec. 9, eff. June 19, 2015.