Texas Transportation Code - TRANSP § 521.304. Cancellation of Minor's License on Cosigner's Request;  Release From Liability

(a) The person who cosigned a minor's application for a driver's license under Section 521.145 may file with the department a request that the department cancel the license.  The request must be in writing and acknowledged.

(b) On receipt of a request under Subsection (a), the department shall cancel the minor's license.  On cancellation, the person who cosigned the application is released from liability based on the person's signing of the application for any subsequent negligence or wilful misconduct of the minor in operating a motor vehicle.