Texas Transportation Code - TRANSP § 372.056. Information Required on Notice or Invoice

(a) A notice or an invoice of unpaid tolls sent by a toll project entity must clearly state that the document is a bill and the recipient is expected to pay the amount indicated.

(b) A notice or an invoice of unpaid tolls sent by first class mail must clearly indicate on the outside of the envelope that the document enclosed is a bill and the recipient is expected to pay the amount indicated.