Why can I only send multiples of 5€ if I deposit in cash?

ATMs only accept notes. For this reason, when you select payment in cash, we will remind you that you must round the amount you wish to send to adapt it to the form of payment you chose.
For instance: imagine you want to send 200 USD to Miami. The total amount payable in such case will be 153.70€, commission included. Because you are unable to deposit this amount in the ATM, we will offer you the option to round the amount you must deposit to 150€ or to 155€, adjusting the amount to be delivered at destination accordingly.