It's possible that the agreement might have terms related to subletting or whether she had the authority to sublet to you. Well technically you could sue the sublets.But if your landlord finds out? First, the tenant should ask permission to sublet their rental. And one final thing: You may find tenants who sublease without your permission. This should be a total non-starter. Renters should always ask for their landlord's consent to sublease if they want to sublet their apartment. If I never signed a lease agreement and someone sublet the property to me without obtaining signatures from the landlord. When tenants cannot fulfill their obligations for whatever reason, they may seek out a sublet tenant. If you want to sublet your property, the first thing you should do is review your lease agreement.