Some transactions, like the paywave ones, don’t show up immediately because they can go through what is effectively a 2 stage process:
• The 1st stage is the authorisation stage – which is done at the time of purchase. The bank checks if you have sufficient funds for the transaction to be processed – and if so, the transaction gets approved and the bank puts a hold on the funds. The transaction won’t appear in your Transaction History at this stage. We call these “Pending” Transactions. In YouMoney (but not the mobile app) the Available Balance takes into account funds that have a hold put on them.
• The 2nd stage is when the merchant that the transaction was done through “banks” the transaction, and this is when it shows up in your Transaction History. Not all merchants bank their transactions daily, and this is why you might see transactions appear in your Transaction History days after you physically made them. Not all authorisations turn into a banked transaction, though. Some, such as the holds that hotels apply when a customer checks in (to cover minibar and any other incidentals), just drop off once they are no longer valid.
Currently for transactional accounts we only show the “banked” transactions – but we are hoping that by about mid next year we will also be able to display Pending transactions too for these accounts.
You can find more info on Pending Transactions https://www.bnz.co.nz/support/credit-cards/card-security/unusual-transactions#pending-transactions
When an account has pending transactions on it, we do take these into account when authorising later transactions though – so to establish why your account went overdrawn we’d need to look into this a bit more for you. Happy to do this for you if you like, just PM me your access number.