My mother has dementia. We're waiting for a diagnosis, but there's no question about her symptoms. She's unable to retain numbers now - she can't even remember the numbers for her own date of birth, although she can say the day and month (eg 21st January rather than 21/01). As a result, she can't remember PIN numbers - not a problem, we are going to try and get her a chip and signature card. The difficulty comes in shops, when she can't work out money. She opens her purse and lets the assistant take what they need. This is worrying, as I feel it leaves her vulnerable to unscrupulous shop assistants, but might also mark her out as a potential victim. Any practical ideas would be useful. Thanks!