Because it is fast. The money is often available to them within minutes. That means the victim may not be able to stop the payment before it’s received. Since the money is usually picked up in cash and in person, it may be impossible to find the crook and get it back. Some scammers are also instructing victims to send cash using a delivery service. If you suspect you’ve been scammed, contact the money transfer service or delivery service you used immediately. It may be possible to stop the crook from getting the money if it hasn’t been picked up yet.