When a transaction takes place, we ensure that you have sufficient money in your bank account to cover all pending Hilton Honors Debit Card transactions, to ensure you remain within your bank limits.
So for instance, if you are doing a £20 transaction, and have £90 of uncleared Hilton Honors Debit Card transactions, we will check to make sure you have £110 in your bank account. If you have more than £110 your transaction will go through, otherwise it will be rejected for insufficient funds.
You can see the status of your transaction, and all pending payments, in the Hilton Honors Debit Card app.