Tex. R. Civ. P. 108
Where the defendant is absent from the State, or is a nonresident of the State, the form of notice to such defendant of the institution of the suit shall be the same as prescribed for citation to a resident defendant; and such notice may be served by any disinterested person who is not less than eighteen years of age, in the same manner as provided in Rule 106 hereof. The return of service in such cases shall be completed in accordance with Rule 107. A defendant served with such notice shall be required to appear and answer in the same manner and time and under the same penalties as if he had been personally served with a citation within this State to the full extent that he may be required to appear and answer under the Constitution of the United States in an action either in rem or in personam.
Tex. R. Civ. P. 108