Scam type
The Currency Exchange Ripoff
The most profitable tourist scam in Europe never touches your pocket — you hand the money over voluntarily, at a counter, with a receipt. The whole industry runs on one gap: the difference between the rate you saw and the rate you got.
Updated August 2026
What it is
A family of tricks with one shared engine: you never know exactly how much local currency you should receive, and someone in the middle does. It spans storefront exchanges with predatory spreads, card terminals offering to charge you in your home currency, tourist-zone ATMs with “guaranteed conversion,” and — at the criminal end — street changers handing over padded wads. No other tourist scam moves more total money, because this one operates legally, at scale, with signage.
How it works
The zero-commission spread. The window displays a big attractive rate and NO COMMISSION in six languages. The big rate is usually the buy rate (what they pay for your crowns or lira, not what they charge for them); the sell rate hides on line two in smaller type, 10–30% off fair. Nothing is hidden, strictly speaking — the design just ensures you do the math after the money changes hands. Tourist-strip offices in Prague built an entire industry on this layout.
Dynamic Currency Conversion (DCC). The card terminal or ATM offers to charge you in your home currency — “so you know exactly what you’ll pay.” The rate behind that convenience belongs to the merchant’s bank and runs 4–10% against you, on every transaction, worldwide. This is the most widespread version because it lives inside legitimate purchases: hotels, restaurants, ATMs, even metro ticket machines.
The tourist ATM. Freestanding machines in bright colors, planted precisely where tired travelers land: premium fixed fees plus an insistent DCC screen, sometimes with the decline button styled to look like the wrong choice. The interface is the scam.
The street changer. The only criminal member of the family: a whispered “change money? best rate” near a tourist square. The wad is padded with expired notes, wrong currencies, or plain paper — and the follow-up crew of fake “police” who confiscate your cash for “counterfeit checking” is part of the same act.
How to recognize it
What it looks like
Any moment where someone else proposes the conversion: a window leading with a rate that isn’t the one you’ll get, a terminal asking “euros or home currency?”, an ATM guaranteeing a rate, a stranger offering one. The bigger the promise — ZERO COMMISSION, GUARANTEED, BEST RATE — the wider the spread behind it.
How to avoid it
Do this instead
Three rules cover the entire family. Pay by card in local currency, always — decline every conversion offer on every screen. Withdraw from bank-branch ATMs only, also declining conversion. And before any cash exchange, ask the one question that no trick survives: “How many [crowns/lira] will I receive for this amount, in total?” — then count it at the counter, keep the receipt, and walk out on any answer that differs from the window.
If you’re caught
Storefront exchange: go back immediately with the receipt — in Czechia you have a legal cancellation window (three hours; the offices must post it), and elsewhere a calm request plus a note about the local trade inspection recovers money more often than you’d expect. DCC on a card: your bank can’t usually reverse the rate, but flag it and stop feeding the meter — the fix is behavioral. Street changer or fake-police confiscation: that’s theft, not exchange — police report the same day, with locations; these crews work fixed patches and reports build the case that clears them out. And run the arithmetic once afterward: knowing exactly what the trick cost is the vaccine that makes it never work on you again.
Quick answers
What does 'zero commission' actually mean at exchange offices?
Exactly what it says — and nothing more. The office earns through the spread: it sells you local currency at a rate 10–30% worse than the fair mid-market rate, so no separate commission is needed. The honest offices have thin spreads; the tourist-strip ones have savage spreads and the biggest ZERO COMMISSION signs. The sign is the tell, not the reassurance.
Should I pay in local currency or my home currency when a card machine asks?
Local currency, every single time, everywhere in the world. The 'pay in your own currency' option is Dynamic Currency Conversion — the merchant's bank sets the rate, typically 4–10% worse than your own card's rate, and the convenience of a familiar number is what you're paying for. Choosing local currency hands the conversion to your bank instead.
Which ATMs should I avoid abroad?
The freestanding, brightly-branded convenience ATMs clustered in tourist zones — they layer premium withdrawal fees on top of an aggressive conversion offer. Use ATMs physically attached to bank branches, decline any on-screen 'guaranteed rate' conversion, and withdraw larger amounts less often to dilute fixed fees.
Can I reverse a bad currency exchange?
Sometimes — it depends on local law. Czechia, after years of exchange scandals, introduced a cancellation right: with your receipt you can reverse the transaction within a short window (three hours is the figure posted in offices). Elsewhere you're usually relying on goodwill, which is why the one-question check before handing over money matters more than any remedy after.