Dealing with the DWP in my experience is a complete waste of time. Last year I had someone claiming benefit from my house. I did not know the man and reported it several times even to the extent of going into a DWP office only to be told there was nothing they could do because they had no way of knowing if I was telling a lie, and trying to stop him, claiming! This went on for seven months. I was very concerned that this man would turn up on my doorstep at sometime so I reported it to my MP who sent my concerns to the director General of the DWP who took the case up.
I then received a phone call from the DWP telling me that the matter had been an administrative error and that somebody had put in my address by mistake and I would no longer received any post from them. An hour later, the man turned up on my doorstep, demanding his paperwork. It turned out the DWP had told him where I lived, and where the paperwork had gone to. He was belligerent and nasty. I was so upset that my neighbours insisted I called the police and report him which I did. The DWP had done no background check on him he had merely filled in forms given a mobile number and his bank details. I would never deal with them in the future, I would make an appointment with either age, UK or citizens advice