Authentication starts before payment. A strong listing gives clear photos, consistent condition notes, proof of purchase when available, and a seller history that makes sense.
Start with consistency
Compare the logo stamp, stitching, hardware finish, zipper pull, interior label, serial format, and date code rules for that specific brand and year. A real bag can still have wear, but the details should belong to the same story.
Use third-party authentication for high-value purchases. The fee is small compared with the cost of a mistake.
