Tex. Transp. Code § 601.161

Not later than the 11th day before the effective date of a suspension under Section 601.159, the department shall send notice of the suspension to each affected owner or operator. The department shall send the notice by first class mail or by e-mail to any owner or operator who has provided an e-mail address to the department and who has elected to receive notice electronically. The notice must state the amount required as security under Section 601.153 and the necessity for the owner or operator to file evidence of financial responsibility with the department.