Look at the box. Not just glance at it, but actually inspect it. You're looking for signs that the package was opened, tampered with, or never sealed properly in the first place. A genuine product will have a tight, intact seal—usually a plastic wrap or a sticker that breaks when you open it. If the seal is loose, peeled, or missing entirely, put it back. That's your first red flag.

Counterfeiters cut corners. They often skip the tamper-evident features that legitimate brands spend money on. So if the packaging doesn't feel solid, that's a hint.