Landlord permission is crucial; a written consent is typically required for any subleasing arrangement. Subletting is when thirdparty rents or "subleases" the property from the original tenant.Create your Pennsylvania sublease agreement and sublet your property. Rent your unit to a subtenant with our attorney-approved template. Notices are not needed. However, if Tenant stays or leaves property in the Apartment after the Lease ends, Tenant must also pay Landlord double the rent amount. Subleasing is when your tenant allows another person(s), not on the original signed lease, to live in your rental property and cover the monthly rent payment. A sublease agreement is considered a written document that offers the lessee a chance to pass on the responsibility and rights of tenancy to another person. You don't have a case with your landlord. He is owed the rent regardless of who is supposed to pay it.