In certain countries a popular scam in tourist areas involves a lost wallet. It works like this:
- A stranger picks up a wallet in front of you.
- He offers you half the cash inside.
- If you accept, he disappears and his larger, angrier accomplice appears, demanding the full amount that was in the wallet.
In short: When traveling abroad, if something seems too good to be true, assume it is. Especially if it involves free money.