Texas Finance Code - FIN § 347.153. Requirements for Amendment

(1) confirmed in writing;

(2) signed by the consumer; and

(3) returned to the creditor.

(1) the terms of the amendment; and

(2) the new due dates and amounts of the installments.

(1) deliver a copy of the writing to the consumer; or

(2) mail a copy of the writing to the consumer's address shown on the credit document.