same customer as the other 2 posts, he's a dam site smarter than me on your tills, at the moment, more training please 
when a customer losses their card and the account has money on it>
how/can you transfer the whole account details to another account no
or
simply replace the card with another card with a different no. on it but use the same account
customer accounts on the till at the moment.
also disable lost card for being used
ta.