Empty envelopes in your mailbox? Do not scan that code

A plain white envelope shows up in your mailbox. It is addressed to you. It may even have a tracking number. The sender's name looks unfamiliar, but the delivery seems real. Then you open it. Nothing is inside. No note. No product. No explanation. That would make anyone curious. And that is exactly what scammers may be counting on. Investigators and consumer protection groups have warned that empty envelopes and mystery packages can be tied to a scam known as brushing. In a more dangerous versio