BAYYAN LIY@ is a free lifestyle application developed by Administration des Douanes et Impôts indirects for Android devices. It offers secured authentication, identification, and traceability using digital technologies. The app affixes digital stamps with special security features (overt, semi-covert, and covert) to legitimate products, which can be activated to access product information and traceability data.

The app provides citizens with the ability to authenticate the security features of the activated stamp, and use its unique identifier to access the data electronically. If any product with the affixed stamp is suspicious, citizens can immediately file a report through the app, which facilitates field inspections. BAYYAN LIY@ is an efficient solution for citizens to verify the authenticity of products and file reports on suspicious products.