Code of Civil Procedure Article 77-21
In cases where a motion for issuance of a payment order is deemed to be the initiation of an action or a motion for mediation in accordance with the provision of the first paragraph of Article 519, the court costs or filing fees shall be taxed in full in accordance with the provisions of Article 77-13 or Article 77-20.In such cases, the party moving for issuance of a payment order may have the filing fees that were paid for that motion deducted from the court costs or filing fees to be paid in accordance with the provision of the preceding paragraph.