From time to time, I have transactions which when settled are different to the original authorised amounts. FX transactions are some of them, but others travel related mainly.
e,g. When I catch my local bus service, I get 10p per-authed from my account. A day or so later, that will change to £2.30, £3.90 or £4.50 depending on my usage for that day.
My suggestion is when any transaction settles for a different amount that was pre-authed, can I get a notification of such?
It would also help those who suddenly become overdrawn because of this. It could also help prevent possible fraud if I knew at the time of settlement that more was taken out of my account than I had expected (e.g. hotel charges)