My mum has moderate dementia,she can come across as being quite well until you ask her questions then its very obvious that she is confused. She has one bank account,that is savings towards her funeral and it has had no activity in many months. Today she was awarded a sum of money,I was arranging it to be transferred into her account when I noticed that my brothers name has now been added to the account. I also noted that £1000 is missing from the account. I asked my mum if she had been to the bank and added my brother to the account but obviously she has no memory. I always assumed you couldn't be added to an account unless you have power of attorney and to my knowledge he does not have power of attorney. I don't know what to do,I'm concerned that he will fritter the money away until there is nothing left for funeral costs. I'm concerned that he may have went to the bank with mum and withheld the fact that she has dementia. Just grateful for any advice.