Texas Natural Resources Code - NAT RES § 51.252. Refund of Purchase Money

(a) If a patent cannot be issued for land because of a conflict, erroneous survey, or illegal sale or if a patent is issued for land and is later canceled, the comptroller, on proper proof, may issue his warrant to the proper parties for amounts paid in good faith to the State Treasury for taxes, lease payments, or purchase payments on this land.

(b) Proof of these good-faith payments may be shown by the certificate of the commissioner if the records of the land office show that a patent cannot be issued because of conflict, erroneous survey, or illegal sale or that a patent has been canceled.

(c) The provisions of this section do not apply to surveys on which the errors may be corrected.