Texas Estates Code - EST § 202.051. Service of Citation by Qualified Delivery Method When Recipient's Name and Address Are Known or Ascertainable

(1) each distributee who is 12 years of age or older and whose name and address are known or can be ascertained through the exercise of reasonable diligence;  and

(2) the parent, managing conservator, or guardian of each distributee who is younger than 12 years of age if the name and address of the parent, managing conservator, or guardian are known or can be reasonably ascertained.