BIS (Bureau of Indian Standards) Hallmarking is a certification that confirms the purity and fineness of gold and silver jewelry. As per the BIS (Hallmarking) Regulations, 2018, it is mandatory for all jewelers selling gold jewelry in India to obtain BIS Hallmark registration for each retail outlet. https://swapon.co.in/services/other-services/bis-hallmark-registration-process-in-india_i113900