Trésor Vintage has a rigorous double authenticate process, from the source end to our end. First authentication with our reputable authorized authenticators globally, then second authentication using an Artificial Intelligence (AI) technology referencing millions of microscopic surface images and algorithms to proof the authenticity. Our pre-loved bags all come with their own certification and our clients will receive all the information about the piece once they received it. A full refund would be offered if you found any of our items a counterfeit.