A friend told me about a internet scam that leaves Paypal, UPS and credit card companies passing the buck to each other.
A scam online site accepts a Paypal payment for a product. The scammer ships a piece of junk to the same town as the buyer but to a different address. That way he can send the buyer a tracking number. The tracking information doesn't reveal the exact address. It only shows the town and state.
When the buyer doesn't get a package, he asks Paypal for a refund, but they say the package was delivered. The buyer contacts UPS. UPS won't reveal the address to which the package was delivered, but they do admit the package wasn't delivered to the buyer's address. The credit card company (Discover) won't refund charges because they say it is Paypal's responsibility.
The case is ongoing.