Tex. Transportation Code § 372.055

(a) A toll project entity may not send an invoice or a notice of unpaid tolls to the registered owner of a vehicle soliciting payment of a toll or any related administrative fee unless the entity first determines, for a toll collection customer using a transponder, whether there is an active electronic toll collection customer account that corresponds to the transponder.

(b) A toll project entity shall satisfy an unpaid toll, at the standard electronic collection rate and without the imposition of administrative or late fees, from an active electronic toll collection customer account discovered under Subsection (a) if:

(1) the account:

(A) corresponds to a transponder issued by the entity; and

(B) is sufficiently funded; and

(2) the customer to whom the transponder was issued has complied with Section 372.054.

(c) Regardless of whether an active electronic toll collection customer account is discovered under Subsection (a), a toll project entity may send an invoice or notice for payment to collect an unpaid toll and related costs if:

(1) the account is insufficiently funded; or

(2) the electronic toll collection customer's failure to comply with Section 372.054 prevents satisfaction of the unpaid toll from the electronic toll collection customer account.

(d) If in complying with Subsection (a) a toll project entity discovers that a transponder issued by the entity did not work correctly more than 10 times in a 30-day period and must be replaced, the entity shall send to the customer to whom the transponder was issued a notice stating that the transponder is not working correctly and must be replaced.

(e) A toll project entity is not required to send additional notice to an electronic toll collection customer under Subsection (d) if the toll project entity has sent notice to the customer under that subsection and the customer does not replace the transponder.