246 Pa. Code § 517
The magisterial district judge shall mail a copy of the order for possession to the tenant by first class mail and shall deliver a copy of it for service to the sheriff of, or any certified constable in, the county in which the office of the magisterial district judge is situated. If this service is not available to the magisterial district judge, service may be made by any certified constable of the Commonwealth. The officer receiving the order for possession shall note upon the form the time and date that it was received, and shall serve the order within 48 hours by handing a copy of it to the tenant or to an adult person in charge for the time being of the premises possession of which is to be delivered or, if none of the above is found, by posting it conspicuously on those premises. The service copy of the order shall contain the following notice:
If you, and all occupants of this property not authorized by the owner to be present thereon, do not vacate this property within 15 days after the date of this notice, the law authorizes me to use such force as may be necessary to enter upon the property, by the breaking in of any door or otherwise, and to eject you and all unauthorized occupants.
If you, and all occupants of this property not authorized by the owner to be present thereon, do not vacate this property within 10 days after the date of this notice, the law authorizes me to use such force as may be necessary to enter upon the property by the breaking in of any door or otherwise, and to eject you and all unauthorized occupants.
The date of the notice shall be the same as the date of the service.
246 Pa. Code § 517