Cement and limestone on the coast
The plants here mean cement moves in volume through the local trade, and coastal humidity makes rotation more important than inland. The driest area, a raised floor, and a movement report telling you what is turning are what protect that stock.
Port-linked industrial buyers
Port operations and the industry around them bring contractors on formal terms with gate registers and audited payment. An invoice carrying both GSTINs, HSN codes and the PO reference is what clears, and the challan reconciles at their end.
A coastal district with spread towns
Loads go out along the coast to towns an hour or two away. The challan with the date, vehicle, destination and receiver, held against the party permanently, is the only evidence the load arrived when questioned later.