I've been through this.... in order through it to be legally enforced, it has to go through a court. It should be served through a process server, which is normally a constable in the Commonwealth of Pennsylvania or by certified mail. To be honest, once an eviction notice to quit/vacate process starts, it can take 6 months or more to actually be enforced if you or your attorney are versed in the law.

I've successfully brought action against a landlord who tried to evict my family illegally without an attorney because I used free resources available to do my research.