Currency exchange services have been making a profit from uninformed travellers since Christopher Columbus started his voyages across the Atlantic Ocean. You are probably used to being told, 'we don't charge any fees and we take 0% commission!' How fantastically kind of them, right? Wrong! Even if they claim to be free from commission, they will hide payment within their rates in which they deliberately set low to capitalise on each exchange. Anything above that, they get to keep.