When you buy something in a shop using your debit card, your ‘available funds’ are decreased by the amount you have spent but your “balance” won’t change and you won’t be able to see the transaction on your statement.
Retailers can take up to 4 days to claim the funds from your account. That is when your balance is reduced.
On your Account Summary mini-statement, the transaction will appear as “Debit Card Transaction”. You can also see more information with the tool tip when you hover your mouse over the transaction on your mini-statement.
On your full statement, the last four digits of your card number, the date of the transaction and the name of the retailer are shown.