You just need to ask the manufacturer for a copy of their barcode application certificate. There is no such thing as authorization to use barcodes. Barcodes cannot be authorized for use by others. As a dealer, your relative only sells products with barcodes. He has the right to ask the manufacturer for their product barcode certificates. As long as there is a certificate stating that the barcode on the product is not counterfeit, the Supervision Bureau has no power to impose penalties.