If you have a contract that you signed with the landlord of the mobile home park where the trailer is or was located, you would be responsible to the landlord for all aspects surrounding the lease and the trailer even if you no longer own it such as unpaid rent.If the former owner (now current owner that you returned title of the mobile home to) agreed in writing to be bound by your written agreement with the landlord and the landlord in writing released you from the agreement, then you would no longer be responsible under it. I do not see this being the case from what you wrote.The terms of your agreement with the landlord control the situation. You need to read the lease assuming there is one in writing to determine your and the landlord's obligations and recourse. From what you have conveyed, there is a good chance you can be responsible to the landlord for his claims/damages arising from any agreement you have with him/her as to the mobile home.