<h1>Foreign Missions and UN Warn Vendors: Record UINs on Invoices or Face Action Under CGST Rule 46.</h1> Complaints have been raised by Foreign Diplomatic Missions and UN Organizations about vendors and e-commerce platforms refusing to record their Unique Identity Number (UIN) on invoices. The UIN is a 15-digit number essential for these entities to claim tax refunds in India. Suppliers are reminded that recording the UIN is mandatory under rule 46 of the CGST Rules, 2017, and non-compliance could lead to action under the CGST Act, 2017. Businesses, including major brands, are urged to update their systems to facilitate this requirement. A search function for UINs is available on the GST Common Portal.