Does your dad ever actually need his bank card?
If he doesnt and he just wants the security of having it on him, you could cancel that card, but let him keep it on him and take the new card away for you to keep.
If he realises that it doesnt work, then its time for "love lies". You have ordered a new one from the bank - it will be arriving any day now......
Yes he does occasionally when his carer wants to take him shopping or if he needs cash then she would use it. We had already taken it off him for that very purpose but it just wouldn't work sadly. Plus we've already renewed the card recently so he might get a bit suspect on that front! He still remembers that.
Thanks for the info though.