Discovery is not ours but Goran Jeras. But he even shared it with Facebook on Facebook.
What is it about?
Jeras discovered that you could put someone's account into a minus.
Namely, on each foreign exchange transaction, the domestic bank fee is also charged to the sender and the recipient. So it may happen that, if you pay a very small amount, the bank will charge the recipient a higher amount of remuneration than what it received.
And how does the thing work in practice?
Well, if you do not like HDZ or SDP, pay a one-cent donation to these parties, and the bank will download them from your account for the 50 kuna.
The thing works for the rest, and we have mentioned these two only because of the account balance.