This question has been addressed in 1 Texas court opinion:
COA13 — January 30, 2026
In this mandamus proceeding, Relator Juan Pardo sought to vacate trial court orders for his arrest via ex parte writs of attachment. Although Pardo was represented by two attorneys of record, he filed the petition pro se. The Real Party in Interest moved to dismiss, arguing that Texas law prohibits 'hybrid representation.' The Thirteenth Court of Appeals agreed, holding that a party in a civil case cannot represent themselves while concurrently being represented by counsel. Because the petition was procedurally improper, the court dismissed it without prejudice and lifted a previously granted emergency stay, effectively exposing the Relator to the trial court's enforcement orders.
Litigation Takeaway
“Pro se filings made by a party who is still represented by counsel of record are considered a procedural nullity. Clients must formalize the termination of their legal representation before attempting to file original proceedings independently, or they risk immediate dismissal and the loss of emergency stays.”