Chanel started using serial numbers in their bags in the 1980’s. The numbers represent the year of manufacturing and bag style.
The serial number should match the number on the Chanel authenticity card. If it doesn’t, it’s a red flag.
If you are not buying directly from Chanel or an authorized dealer like Neiman Marcus of Saks 5th Ave, do not be satisfied with just hologram sticker and an authenticity card. Fake bags can come with hologram stickers and authenticity cards now.
Serial numbers run between six and eight digits long, depending on date of manufacturing.