I used to get a carer's allowance, but when my husband reached pension age it was more beneficial to claim a proper pension through his pension, since I had previously only got £2. per week. I informed the Carers Benefit people and nothing happened. I noticed that they kept on paying for about 5 months, every month it was put into the account, and in the end I got so concerned that I sent them an email. I copied everything previously sent to them and put that with it, and waited. Within a couple of hours I had an email back saying that it was wrong and that I should not have got it!!!
Then followed a letter asking for a lump sum, for which I then sent them a cheque. I hate to think how long it wowuld have gone on for if I had not contacted them.