W. Va. Code § 56-3-6: Delivery of process.

The clerk of every court from whose office may be issued any process, original, mesne or final, or any order or decree to be served on any person, shall, unless the party interested, or his attorney, direct otherwise, deliver the same to the sheriff or other proper officer of the county for which the court is held, if it is to be executed therein, and if it is to be executed in any other county, shall enclose the same in an envelope properly addressed to the sheriff or other proper officer thereof, pay the postage thereon and mail it in the post office. Documentation of service of process will be according to rules promulgated by the Supreme Court of Appeals.