Thank you for your question
My name is Clare
I shall do my best to help you but I need some further informtaion first
Have you returned the letter to the sender?
What did you actually do with the letter?
You should mark the letter
"Return to sender - no longer at this address"
Be aware that there is still a possibility that a Bailiff will turn up to try and enforce any fine but if you have returned the letter and can show that he no linger lives there then there will be no problem.
Please ask if you need further details
You are most welcome