There would not be a lot they could do with this information, at worst if they had enough information about you yhey could go into a branch and request a withdrawal form to take cash out, bit they would have to forge your signature. Hopefully the cashier would cheque both signature and balance of account. If it nil the transaction should be declined. A sloppy cashier may pay out, but you would not be liable as this would be fraud. As long as you do not let them have access to your card and pin or internet banking pass word, they could not access the account remotely