The PA statute of limitations for contracts (verbal and written) is 4 years.
So, unless there is a different time limit in the PA landlord tenant statutes, then the tenant can take up to 4 years to sue you.
If he's going to sue you, chances are he won't wait that long.
Check out the PA landlord tenant statute and see if it says different:
- The right of the people
- to keep and bear arms,
- shall not be infringed.