You can legally undo a bad exchange within 3 hours
Must knowAt a currency-exchange booth
By Czech law you may cancel a currency-exchange transaction within 3 hours, in the same branch, for amounts up to the equivalent of €1,000 — a rule created specifically against booths that give tourists terrible rates. Exchange offices must now display only one (the least favourable) rate, so ignore any 'VIP rate for larger amounts' board. Better still: skip tourist-area booths and use a bank ATM.
Official source · reviewed 2026-08-28