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I'm sorry to hear about your situation. No, you don't need a lawyer in justice court:
Texas Gov't Code Sec. 27.031. JURISDICTION. (a) In addition to the jurisdiction and powers provided by the constitution and other law, the justice court has original jurisdiction of:
(1) civil matters in which exclusive jurisdiction is not in the district or county court and in which the amount in controversy is not more than $10,000, exclusive of interest;
(2) cases of forcible entry and detainer;
(3) foreclosure of mortgages and enforcement of liens on personal property in cases in which the amount in controversy is otherwise within the justice court's jurisdiction; and
(4) cases arising under Chapter 707, Transportation Code, outside a municipality's territorial limits.
(b) A justice court does not have jurisdiction of:
(1) a suit in behalf of the state to recover a penalty, forfeiture, or escheat;
(2) a suit for divorce;
(3) a suit to recover damages for slander or defamation of character;
(4) a suit for trial of title to land; or
(5) a suit for the enforcement of a lien on land.
(c) A justice court has concurrent jurisdiction with a municipal court in cases that arise in the municipality's extraterritorial jurisdiction and that arise under an ordinance of the municipality applicable to the extraterritorial jurisdiction under Section 216.902, Local Government Code.
(d) A corporation need not be represented by an attorney in justice court.
(for all intents and purposes, "corporation" here simply means a corporate entity, which would include an LLC)
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