Texas Government Code - GOV'T § 80.004. Mail

(1) first-class mail;

(2) first-class United States mail;

(3) ordinary or regular mail;  and

(4) international first-class mail.

(1) any form of mail that requires proof of delivery;

(2) certified mail;

(3) certified mail or a comparable mailing method that provides proof of delivery;

(4) certified mail, restricted delivery;

(5) certified mail, return receipt requested;

(6) delivery by the United States Postal Service using a signature confirmation service;

(7) documents delivered by common or contract carriers, including Federal Express or United Parcel Service;

(8) express mail offered by the United States Postal Service;

(9) first-class mail, return receipt requested;

(10) freight mail;

(11) interagency mail;

(12) international registered mail, return receipt requested;

(13) mail, return receipt requested;

(14) personal service or hand delivery;

(15) prepaid registered mail;

(16) registered mail;

(17) registered mail, return receipt requested;  and

(18) certified or registered mail, restricted delivery, return receipt requested.