The confederation of all India traders or the CAIT told the government it was worried that Chinese goods were coming in through these Hawala channels. It also proposed a solution: play match the importer with the GST paid at the port and then see if the importer is claiming any credit for it. If not, knock on their doors. Maybe that will work. We don't know. All we can say safely is that we certainly don't want to keep leaking billions of dollars thanks to dubious practices.