Hi Terpe ........ It does seem strange that your friend wanted to use a forwarding address in the UK as one would have thought that if he had intended to abscond and leave his debts behind, that he would have just left the country without any further trace. Perhaps there was another purpose.
It's definately a good idea to return all mail addressed in his name to the sender unopened and suitably noted. They will eventually get the message and stop using your address
I do hope that there are no adverse affects for you ........ keep smiling![]()