Additional Secretary of the Department of Consumer Affairs Nidhi Khare informed that after March 31, 2023, jewellery having a four-digit HUID as hallmark cannot be sold. “After March 31, 2023, jewellery having a four-digit HUID as a hallmark cannot be sold. Instead, jewellery having a six-digit alphanumeric number as hallmark can be sold,” said Additional Secretary Khare.