1. The difference between a challan and an invoice
An invoice is the bill of sale, carrying the rate, the GST and the total; it is a financial document. A challan is proof that goods were sent to a particular place; it carries the quantity and the vehicle, and the rate is optional. Smaller shops often use the invoice itself as the challan, which is perfectly acceptable as long as the delivery details are on it.
2. When GST requires a challan
When goods move without a sale: for job work, on approval where the buyer decides later, between two of your own godowns, or when one order is despatched in several instalments. If the goods are moving as part of a sale, the tax invoice is enough and no separate challan is needed.
3. What to write on a challan
A number and date; your name and GSTIN; the recipient's name and address; the site address; the item, quantity and unit; the vehicle number; the driver's name; and a space for the received-by signature. The vehicle number is the single most important entry, because that is what proves the delivery.
4. Why a digital record matters
Paper is lost, drivers forget and customers dispute. Software keeps every delivery on file with the date, vehicle and items, and sending the PDF on WhatsApp puts the same proof on the customer's phone. You can pull it up six months later and show it.
5. How it works in MaterialBill
While raising the invoice, choose the With Freight option and enter the vehicle type, vehicle number and transport charge. That invoice then serves as the delivery challan: print it on A4 or thermal and share it on WhatsApp. If the customer disputes the delivery, show them the record.
6. Site-wise records for one builder
The argument with a contractor is almost never about whether material was supplied — it is about which project it went to. A builder buying from you across a dozen sites over three years has one account in your ledger and twelve in his own head. Recording the destination site on every delivery means you can produce everything supplied to one address without going through the whole account, which is exactly what his accounts department wants before releasing payment. It is a small field on a form and it settles the most common dispute in the trade.
7. Keeping the challan and the invoice together
A challan that lives on a pad in the truck and an invoice that lives in the bill book are two records that have to be matched by memory. Linked to each other and held against the party, they answer a question years later in one lookup — what went, when, on which vehicle, against which bill, received by whom. Being able to resend that on WhatsApp when a load is questioned is usually the end of the conversation, and in material supply a single contested load is routinely several lakh.