Pennsylvania Landlord-Tenant Complaint Form Help Request

[Linda Thomas]

Lease in only one tenant's name. She JUST told me that she moved out three months ago. I did not know this. Her kids father has been sending me the rent. Now he's not paying anymore he said and he said he won't vacate to do what I have to do. So, I'm guessing i have to file landlord tenant complaint to get him evicted even though he's not on the lease right? so would I add her name to the complaint even though she said she left the unit 3 months ago and include now his name since he's living there (and he was never on the lease at all) and i wasn't aware of this situation or that he was living there? how do I get him evicted?