Texas Code of Criminal Procedure - CRIM P Art. 1.052. Signed Pleadings of Defendant

(a) A pleading, motion, and other paper filed for or on behalf of a defendant represented by an attorney must be signed by at least one attorney of record in the attorney's name and state the attorney's address. A defendant who is not represented by an attorney must sign any pleading, motion, or other paper filed for or on the defendant's behalf and state the defendant's address.

(b) The signature of an attorney or a defendant constitutes a certificate by the attorney or defendant that the person has read the pleading, motion, or other paper and that to the best of the person's knowledge, information, and belief formed after reasonable inquiry that the instrument is not groundless and brought in bad faith or groundless and brought for harassment, unnecessary delay, or other improper purpose.

(c) If a pleading, motion, or other paper is not signed, the court shall strike it unless it is signed promptly after the omission is called to the attention of the attorney or defendant.

(d) An attorney or defendant who files a fictitious pleading in a cause for an improper purpose described by Subsection (b) or who makes a statement in a pleading that the attorney or defendant knows to be groundless and false to obtain a delay of the trial of the cause or for the purpose of harassment shall be held guilty of contempt.

(e) If a pleading, motion, or other paper is signed in violation of this article, the court, on motion or on its own initiative, after notice and hearing, shall impose an appropriate sanction, which may include an order to pay to the other party or parties to the prosecution or to the general fund of the county in which the pleading, motion, or other paper was filed the amount of reasonable expenses incurred because of the filing of the pleading, motion, or other paper, including reasonable attorney's fees.

(f) A court shall presume that a pleading, motion, or other paper is filed in good faith. Sanctions under this article may not be imposed except for good cause stated in the sanction order.

(g) A plea of “not guilty” or “no contest” or “nolo contendere” does not constitute a violation of this article. An allegation that an event took place or occurred on or about a particular date does not constitute a violation of this article.

(h) In this article, “groundless” means without basis in law or fact and not warranted by a good faith argument for the extension, modification, or reversal of existing law.