Confirm the currency (local vs. USD) and payment method before closing the door.
The currency switch is a subtle but effective scam, particularly in countries where USD or EUR are commonly accepted alongside local currency. A driver quotes "20" — and you assume it’s local currency, while they meant dollars. In countries like Cambodia, Ecuador, or parts of Eastern Europe, this ambiguity is deliberately exploited. A variation that became widespread in the 2010s is the "card machine broken" scam: the driver agrees to card payment, then claims the terminal is down after the ride and demands cash — knowing you may not have local currency on hand. Always agree on currency, price, and payment method before closing the door, and if possible, get a rough estimate confirmed by the dispatcher at the official taxi stand.