Coal belt contractors
Mining operations bring contractors working to audited terms with purchase orders and gate registers. An invoice carrying both GSTINs, HSN codes, line-wise tax and the PO reference is what clears, and the challan naming the vehicle and receiver reconciles against their store.
Institutional and education building
The colleges and institutions here build steadily and pay against a process, which is demand that does not swing with mining activity. Those accounts want referenced invoices and a delivery record that reconciles at month end.
Deliveries across the district
Loads go out to towns and mining locations hours away on hired vehicles. The challan with the date, vehicle, quantity, destination and receiver is the only evidence the load arrived when it is questioned later.