Texas Government Code - GOV'T § 855.603. Forfeiture of Contributions

(a) If an application under Section 852.103 for the accumulated contributions of a person who has ceased to be employed by a participating department for a reason other than death or retirement has not been made before the seventh anniversary of the person's last day of service, the retirement system shall return to the person or the person's estate all accumulated contributions of the person.

(b) If the person or the administrator of the person's estate cannot be found, the person's accumulated contributions are forfeited to the retirement system.  The retirement system shall credit the amount forfeited to the perpetual endowment account of the endowment fund.