For good cause (e.g. non-payment of rent), the landlord can file suit to forcibly evict the tenant. If you think the eviction is unjustified, upon receipt of the court summons, contact an attorney or legal aid in the area. A landlord may not evict a tenant without following the procedure as prescribed by Pennsylvania law. Any landlord conducting unlawful procedures (i.e., changing locks on door, forcing a tenant to leave by threats of bodily injury, etc.) may be liable for damage.