If you took advantage of the “Onexchange S.A.” ‘Buy/Sell Back’ special offer when purchasing your currency in Greece, you can return leftover currency from your trip/holiday and we will buy it from you, commission free, at the same exchange rate used for your purchase. All you need is your original receipt as proof of your initial purchase. (Terms & conditions apply). However, even if you did not manage to take advantage of this special offer, you can still get exceptional value for money by bringing your unused foreign currency to any “Onexchange S.A.” bureau de change.