Tex. Code Crim. Proc. art. 102.072

An officer listed in Article 103.003 or a community supervision and corrections department may assess an administrative fee for each transaction made by the officer or department relating to the collection of fines, fees, restitution, or other costs imposed by a court. The fee may not exceed $2 for each transaction. This article does not apply to a transaction relating to the collection of child support.