Tex. R. Civ. P. 143a
As amended through August 27, 2024
If the appellant fails to pay the costs on appeal from a judgment of a justice of the peace or small claims court within twenty (20) days after being notified to do so by the county clerk, the appeal shall be deemed not perfected and the county clerk shall return all papers in said cause to the justice of the peace having original jurisdiction and the justice of the peace shall proceed as though no appeal had been attempted.
Tex. R. Civ. P. 143a