In the state of Pennsylvania 'legitimate' eviction proceedings would come from the courts. As long as a change of address was provided to the postal service said tenant should be sent a copy of the notice from the court.

The way residential leases are in Pennsylvania landlords don't really have to give a notice and anything that was agreed to in the lease is usually gold in the eyes of a judge. So with that said anything the landlord does with the courts is really going to be to file a judgement on unpaid monies or damages.

I've been through it numerous times, stuck in a lease where the landlord isn't keeping up their end of the agreement but the courts back the landlords. I am in the state of Pennsylvania.