Tom Ford sunglasses have metal inserts placed into the tips of the temple arms. Tom Ford should be etched into the generally gold metal insert. This feature will not be included on many of the fakes in the open market. It is too expensive and timely to reproduce, and many buyers often overlook this detail. However, always check the tips of the temple arms for this feature, any pair that is missing this feature should raise an automatic red flag.
This detail is located on the inner temple arm, at the tip, on the inside of the arm, and generally on the left arm. This is not to be confused with the model number, color code, etc that is stamped on the inner temple arm in the middle of the piece. The serial number is tiny, not always easy to see, but is should also be etched into the frame, not printed. Meaning if you run your finger over the tip, you can feel the texture. The sequence will be something like this: LP3159775. This number should also match the number on any of the factory plastic casings and accessories like the Tom Ford box. If the serial number on the inner tip does not match the factory stickers on the plastic or the box, then that is also a red flag.