Whenever you are purchasing an original Jordan, then take a good look at the woven label which is attached to the top of the tongue, where the fake will not have a circle with the registered 'R' trademark, while Nike's original shoes use a doubled 'R' on that tag.

Take a good look at the woven label attached to the top of the tongue. Counterfeit Jordans may not have a circle with the registered “R” trademark, while Nike's original shoes use a doubled “R” on that tag. Embroidery should not be too thick or too thin.

If you are talking about Jordan dot com website then yes it is a legit store. But you can also buy Jordan shoes from Nike's official website.

Air Jordan is a line of basketball shoes produced by Nike, Inc. Related apparel and accessories are marketed under the Jordan Brand. The silhouette of Michael Jordan served as inspiration to create the "Jumpman" logo.