Title 53, Chapter 12, Section 372
(a) All actions brought against a nonresident trustee of real
property in this state shall be brought in the county where the real
property or some portion of the same is located.
(b) In the event that the nonresident trustee has designated a
person or persons to accept service and an action is brought in a
county other than the one in which the person or persons designated
by the trustee to accept service reside, service of the summons and
process under this part may be perfected upon the trustee by a
second original served upon the person or persons in any other
county of this state.