Tex. Civ. Prac. & Rem. Code § 64.076

An action against the receiver of a railroad company may be brought in any county through or into which the railroad is constructed, and citation may be served on the receiver, the general or division superintendent, or an agent of the receiver who resides in the county in which the suit is brought. If no agent of the receiver resides in the county in which the suit is brought, citation may be served on any agent of the receiver in this state.