Consumers have reported receiving empty envelopes in their mailboxes, prompting warnings from authorities about potential "brushing scams." These scams involve sellers creating fake, verified reviews for their products by shipping unsolicited items, often small and inexpensive, to unsuspecting individuals.

In some instances, these empty envelopes may contain QR codes. Authorities advise against scanning these codes, as they could lead to malicious websites or phishing attempts designed to steal personal information. The Federal Trade Commission (FTC) has previously warned consumers about brushing scams, noting that they can involve a variety of items, not just envelopes.

The primary goal of a brushing scam is to artificially inflate a seller's online rating and sales volume. By having a record of shipment and delivery, even if it's an empty envelope, the scammer can create a fabricated transaction that appears legitimate on e-commerce platforms. This can mislead potential buyers into believing the seller is reputable.

Consumers who receive unsolicited packages or envelopes, especially if they contain suspicious QR codes or appear to be part of a fraudulent scheme, are encouraged to report the incidents to the FTC and the relevant e-commerce platform. It is also advisable to change passwords for online shopping accounts and monitor financial statements for any unusual activity.