W. Va. Code § 47-9-4
The Secretary of State is hereby constituted the attorney-in-fact for and on behalf of every limited partnership created by virtue of the laws of this state and every foreign limited partnership authorized to conduct affairs or do or transact business herein pursuant to the provisions of this article, with authority to accept service of notice and process on behalf of every such limited partnership and upon whom service of notice and process may be made in this state for and upon every such limited partnership. No act of such limited partnership appointing the Secretary of State such attorney-in-fact shall be necessary. Immediately after being served with or accepting any such process or notice, of which process or notice two copies for each defendant shall be furnished the Secretary of State with the original notice or process, together with the fee required by section two, article one, chapter fifty-nine of this code, the Secretary of State shall file in his office a copy of such process or notice, with a note thereon endorsed of the time of service or acceptance, as the case may be, and transmit one copy of such process or notice by registered or certified mail, return receipt requested, to the person to whom notice and process shall be sent, whose name and address were last furnished to the state officer at the time authorized by statute to accept service of notice and process and upon whom notice and process may be served; and if no such person has been named, to the principal office of the limited partnership at the address last furnished to the state officer at the time authorized by statute to accept service of process and upon whom process may be served, as required by law, or if no address is available on record with the Secretary of State then to the address provided on the original process or process, if available. No process or notice shall be served on the Secretary of State or accepted by him less than ten days before the return day thereof. Such limited partnership shall pay the annual fee prescribed by article twelve, chapter eleven of this code for the services of the Secretary of State as its attorney-in-fact.
Any foreign limited partnership which shall conduct affairs or do or transact business in this state without having been authorized so to do pursuant to the provisions of this article shall be conclusively presumed to have appointed the Secretary of State as its attorney-in-fact with authority to accept service of notice and process on behalf of such limited partnership and upon whom service of notice and process may be made in this state for and upon every such limited partnership in any action or proceeding described in the next following paragraph of thissection. No act of such limited partnership appointing the Secretary of State as such attorney-in-fact shall be necessary. Immediately after being served with or accepting any such process or notice, of which process or notice two copies for each defendant shall be furnished the Secretary of State with the original notice or process, together with the fee required by section two, article one, chapter fifty-nine of this code, the Secretary of State shall file in his office a copy of such process or notice, with a note thereon endorsed of the time of service or acceptance, as the case may be, and transmit one copy of such process or notice by registered or certified mail, return receipt requested, by a means which may include electronic issuance and acceptance of electronic return receipts, to such limited partnership at the address of its principal office, which address shall be stated in such process or notice. Such service or acceptance of such process or notice shall be sufficient if such return receipt shall be signed by an agent or employee of such limited partnership. After receiving verification from the United States Postal Service that acceptance of process or notice has been signed, the Secretary of State shall notify the clerk's office of the court from which the process or notice was issued by a means which may include electronic notification. If the process or notice was refused or undeliverable by the United States Postal Service the Secretary of State shall create a preservation duplicate from which a reproduction of the stored record may be retrieved which truly and accurately depicts the image of the original record. The Secretary of State may destroy or otherwise dispose of the original returned or undeliverable mail. Written notice of the action by the Secretary of State shall be provided by certified mail, return receipt requested, facsimile, or by electronic mail, to the clerk's office of the court from which the process, notice or demand was issued. No process or notice shall be served on the Secretary of State or accepted by him or her less than ten days before the return date thereof. The court may order such continuances as may be reasonable to afford each defendant opportunity to defend the action or proceedings.
For the purpose of this section, a foreign limited partnership not authorized to conduct affairs or do or transact business in this state pursuant to the provisions of this article shall nevertheless be deemed to be conducting affairs or doing or transacting business herein:
W. Va. Code § 47-9-4