Short answer
The petition is the plaintiff's written claim. It says who is suing, what account the debt comes from, how much they want, and why they say you owe it. Your Answer responds to the petition.
In a justice court debt claim case, Rule 508 requires the petition to include details such as the original creditor, the last digits of the account number, and the amount owed, so missing details can be a defense.
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Updated November 2026. General information about Texas law, not legal advice for your case. Laws and court rules change; we review these answers regularly.