64 Pa. Stat. § 161
Any civil process which shall be issued out of any court of record or from any alderman or justice of the peace within this commonwealth, against the Holland land company, the Pennsylvania population company, or the North-American land company, or other warrant holders, by the name of the respective companies or warrant holders, as the case may require, shall be served on the agent or attorney in fact of said company, or other warrant holders, in cases where attorneys or agents are or may be appointed; and on due proof of said service, and on return thereof being made according to law, the same proceeding shall be had thereon against any of said companies or warrant holders, their agents or attorneys, as is had against other defendants in like cases, agreeably to the laws of this commonwealth.
64 P.S. § 161