I had a similar issue recently. The product ad was for power tools on FB Marketplace. It instructed people to buy directly from their website and use a provided coupon code. The ad specifically talked about how they used PayPal and lauded the protections Paypal offers so buying would be safe. The site looked professional, and the code worked, but the payment page listed a company name in Chinese characters and didn't match the website in any way. Product never showed, but the payment recipient ("seller" seems inaccurate somehow) sent a message relayed through PayPal including a valid USPS tracking number to my zipcode. A scammer doesn't have to hack the post office... if they can acquire a list of tracking numbers by zipcode, it's enough to provide any tracking number that matches your zipcode as "evidence" they delivered to your address. Luckily, I payed through PayPal using VISA, who also offers fraud protection.
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