Authenticate a Céline bag in 3 easy steps: (1) decipher date code, (2) verify accuracy of the brand logo, and (3) confirm heat stamping.  STEP 1: DECIPHER DATE CODE Every authentic Céline bag has a numeric code. Often, it is referred to online interchangeably as a serial number or date code, despite the fact that these two things are fundamentally different. "Serial Numbers" are unique to the product...