One of the best ways to authenticate Jordans is to purchase directly from the brand's official website or retailers. These sources ensure that you are getting genuine merchandise. Additionally, you can use third-party authentication services like Legit Check App, Real Authentication, and Sneaker Con, which specialize in sneaker authentication. GOAT and StockX, two sneaker marketplaces that sell sneakers, offer their authentication services. Sneaker events and consignment stores may offer in-person authentication services, where experts can examine the shoes and verify their authenticity. Engaging with sneaker enthusiast forums and communities can also be helpful, as experienced collectors may have insights and opinions to help you authenticate your Jordans.