Yes. If only all countries can follow Japan's Chanel boutiques, it will be great. Many vintage bags lost their authenticity cards and hologram stickers overtime, hard to verify their authenticity.see second post quoted above. this thread is quite interesting and full of handy info!
With these stickers in place, they more or less help to authenticate a bag, plus they help buyers trace the origin of the bags which is an added bonus. They are like a certificate of birth for a new born Chanel bag/baby.