: Check the inner side of the charging case lid or the hinge.
: If your headphones are paired, you can find the number by navigating to the "Support" or "About" section within the JBL Headphones App . The Role of Authenticity jbl headphones serial number
If you meant something else by "paper" (e.g., a paper-based lookup service or printed database), please clarify and I’ll help further. : Check the inner side of the charging case lid or the hinge
JBL serial numbers typically follow a standardized format, such as AB1234-CD1234567 . Finding this number depends largely on the specific model of your device: : jbl headphones serial number