Texas Notice and Acknowledgment of Service by Mail is a legal document used in Texas civil court proceedings. It is used to acknowledge that a defendant has been served with a copy of a legal document by mail. It is signed by the defendant or their representative and returned to the court as proof of service. There are two types of Texas Notice and Acknowledgment of Service by Mail: the regular form and the special form. The regular form is used when the plaintiff serves the defendant with a citation, petition, or other legal document by mail. The special form is used when the plaintiff serves an amended petition or other document by mail. Both forms require the defendant to sign and return the form to the court as proof of service.