Pre-authorisation
In pre-authorisation transactions, the standing amount can be lower than the initial amount. This happens when the authorisation is either voided or finalised for a smaller amount than originally authorised.
Example: An initial authorisation is made for €10, but the transaction is finalised for €7. In this case, the initial amount is €10 and the standing amount is €7.
Final-authorisation
For final-authorisation transactions, the difference between the initial and standing amounts can appear when a refund has been made before checking the transaction status.
If a full refund is processed, the standing amount becomes €0.
If a partial refund is processed, the standing amount reflects the remaining balance.
The initial amount always refers to the full amount of the original payment, regardless of any refunds issued.