(a) The party who files a notice of application for a writ of withholding shall deliver the notice to the obligor by:
(1) first-class or certified mail, return receipt requested, addressed to the obligor's last known address or place of employment; or
(2) service of citation as in civil cases generally.
(b) If the notice is delivered by mail, the party who filed the notice shall file with the court a certificate stating the name, address, and date the party mailed the notice.
(c) The notice is considered to have been received by the obligor:
(1) on the date of receipt, if the notice was mailed by certified mail;
(2) on the 10th day after the date the notice was mailed, if the notice was mailed by first-class mail; or
(3) on the date of service, if the notice was delivered by service of citation.
Official text of the Texas Family Code as published by the Texas Legislative Council.