Any proceeding may be brought against a personal representative or the surety on his bond in the county where his letters have been granted, and if the personal representative or surety does not reside in that county, process may be served on either of them personally, or as follows:
(1) When resident of another county.--By a duly deputized sheriff of any other county of the Commonwealth in which he shall be found.
(2) When a nonresident of the Commonwealth.--By the sheriff of the county where letters have been granted sending, by registered mail, return receipt requested, a true and attested copy of the process to the Department of State, accompanied by the fee prescribed by law, and to the personal representative or surety at his last known address, with an endorsement thereon showing that service has been so made upon the Department of State.