Is a stranger who claims to have found cash and wants to share it with me running a scam?

The pigeon drop is one of the oldest known confidence tricks. A stranger approaches you saying they found a wallet, envelope, or bag of cash and proposes splitting it with you. But first, they say, you both need to put up some 'good faith money' while they check with a lawyer or manager about what to do. Once you hand over your cash, the stranger and any accomplice disappear and the found money turns out to be fake or non-existent. The entire interaction is scripted by a professional fraudster. The core mechanic — using the prospect of free money to persuade you to hand over real money — is the same principle as advance fee fraud. No genuine finder of lost cash would approach a random stranger with this proposal.

Street confidence tricks share a choreography worth recognising in general form: an unexpected windfall or crisis, a second stranger who conveniently appears to confirm the story, a reason you must decide within minutes, and a step that requires your own money or valuables to unlock the gain. The accomplice matters most — corroboration from an apparently independent bystander is what converts a bizarre proposal into a believable one. Older adults are approached disproportionately, often near banks. The defence requires no cleverness in the moment, only a fixed personal rule: any street proposal involving your money and a deadline is declined without negotiation, however friendly its presentation.