To verify the authenticity of products on eBay and Amazon: Check Seller Ratings and Reviews: Look for high ratings and positive feedback from previous buyers. Look for Authenticity Guarantees: Purchase products that come with manufacturer warranties or are sold directly by the brand. Examine Product Listings: Be wary of unusually low prices or vague product descriptions, which may indicate counterfeit items. Report Suspicious Listings: If you suspect a product is counterfeit, report it to the platform and relevant authorities like the United States Patent and Trademark Office (USPTO). Use Official Channels: Whenever possible, buy from official stores or authorized sellers to ensure product legitimacy.