Case study: a B2B parts seller ships with packing list envelopes
"Invoice copy bhejo." For a seller who supplies dealers, that WhatsApp message is a small cost that arrives many times a month. Someone stops packing, finds the PDF, sends it, and goes back to the table.
Each time, it means the paper did not reach the person who needed it.
This is a worked example. The business is illustrative, put together from situations small sellers commonly face. The product details and the maths are real.
The seller: 350 orders, three kinds of parcel
Picture a spare-parts trader in Ludhiana. They supply bicycle and two-wheeler parts (chains, brake shoes, bearings, cables) to dealers and workshops across North India. Every buyer is a business with a GSTIN, and every order goes with a GST invoice.
They ship about 350 orders a month. For the maths, assume this mix:
- 200 orders go in one carton.
- 100 orders go in two to four cartons, about 3 on average.
- 50 small orders go in courier bags.
Today the invoice is folded and dropped inside the carton, on top of the parts. Sometimes it is taped flat on the outside with clear tape instead.
Both fail in ordinary ways. Inside, the invoice sits among oily parts and gets thrown out with the packing paper. Outside, the dealer's helper slits the tape with a knife and cuts the invoice in half. On a 3-carton order, cartons 2 and 3 carry no paper at all, so nobody at the dealer end can check them against the order without opening carton 1 first.
Where should each piece of paper go?
This is the decision that matters. The envelope is only the holder.
We sell the envelopes, so I could stop at "buy some". I will not, because the wrong paper in the right envelope still leaves a dealer calling you.
Under Rule 48 of the CGST Rules, an invoice for goods is made in triplicate: the original marked ORIGINAL FOR RECIPIENT, the duplicate marked DUPLICATE FOR TRANSPORTER and the triplicate marked TRIPLICATE FOR SUPPLIER. You can read Rule 48 on the CBIC site. If your business issues e-invoices, sub-rule (6) says the duplicate and triplicate copy requirement does not apply, but a printed copy still helps the store team at the dealer end check the goods.
So, if I were setting up this dispatch desk, the paper map would look like this.
| Paper | Where it goes | Holder |
|---|---|---|
| Invoice, the copy marked ORIGINAL FOR RECIPIENT | Flat on carton 1, top face | A4 packing list envelope, printed |
| A second invoice copy, for big orders | Inside carton 1, on top | None needed |
| Carton slip ("Carton 2 of 3" and what is inside) | On every other carton | A5 packing list envelope |
| The copy marked DUPLICATE FOR TRANSPORTER, and the e-way bill where needed | With the courier or transporter, as they ask | Their docket |
| The copy marked TRIPLICATE FOR SUPPLIER | Your own file | None |
| Invoice for a small order in a courier bag | The POD jacket on the bag | None needed |
The carton slip is the cheap trick.
Half a page, printed from the same order: carton number, the total cartons and the part numbers inside. The dealer can count and check each carton on arrival without hunting for carton 1.
What about the e-way bill?
Keep this part simple and confirm the details with your CA.
Rule 138 says, with some exceptions, that an e-way bill is needed when a registered person moves goods of consignment value above Rs 50,000. That value includes the GST charged on the invoice. Where goods go through a courier agency, the courier may file Part A on your authorisation. Rule 138A says the person in charge of the vehicle carries the invoice, bill of supply or delivery challan, and the e-way bill copy or number. You can read Rule 138 and Rule 138A on the CBIC site.
Two practical points for this seller. First, the envelope on the carton holds the dealer's copy. Do not assume it also serves as the papers for the vehicle. Second, for a move inside Punjab, check the state limit with your CA. I am a packaging man, not a tax adviser, and that is all the tax I will say here.
Why these envelopes, and what else they considered
Our packing list envelopes are self-adhesive polyethylene pouches in A4, A5, A6 and A7, plain or printed, in packs of 100, 150, 200, 500 and 1000. Each size is made for that paper size.
For this seller, I would use two sizes.
- A4 for the invoice. A spare-parts invoice often runs to many line items and more than one page. The dealer's accounts team wants it flat and readable, not folded into a small square.
- A5 for the carton slip. A half-page slip goes in flat.
I would take printed envelopes for the A4 invoice. These cartons pass through transport godowns and many hands, and printing makes the pouch harder to mistake for rubbish.
Here is what else they could use. We sell most of these too, so I have no reason to hide them.
- Our 9.5 x 4.5 inch delivery note bags, clear and printed, in packs of 500 or 1000. They suit a one-page invoice folded in three, like a letter. Most invoices from this seller are longer, so A4 fits better.
- A6 envelopes, for a one-page invoice folded twice. That is cheaper per piece and fine for a D2C parcel. B2B accounts teams usually prefer the flat sheet.
- No envelope, just the invoice inside the box. It costs nothing, and it is exactly what is failing today.
The dispatch desk, step by step
- Pack and tape the cartons first. Our guide on how to tape a shipping carton covers the H-pattern for heavy boxes.
- Number every carton with a marker: 1 of 3, 2 of 3, 3 of 3.
- Choose the top face of each carton. Wipe the spot with a dry cloth. Spare-parts cartons pick up oil and dust, and no adhesive grips a greasy surface.
- Put the paper in the envelope before you stick it down. The invoice goes in the A4 envelope for carton 1, the slips go in A5 envelopes for the rest.
- Peel the liner, place the envelope next to the shipping label, at least a thumb's width from every edge and never across the tape seam.
- Press from the centre outwards, then run your thumb along all four edges.
- For any order where a lost invoice would really hurt, put a second copy inside carton 1.
One more habit for oily parts. Bag them in a poly bag before they go into the carton. That keeps oil away from the paper inside and off the carton face outside.
The numbers: envelopes per month and when to reorder
The maths below uses the order mix above and adds 5% for spoiled or re-done envelopes.
| Envelope | What it holds | Needed a month | Plus 5% | A 500 pack lasts | Reorder at |
|---|---|---|---|---|---|
| A4, printed | One invoice per carton order (200 + 100) | 300 | about 315 | about 7 weeks | about 150 left |
| A5, plain | Slips for cartons 2 onwards (100 orders x 2) | 200 | about 210 | about 10 weeks | about 100 left |
| None | 50 courier-bag orders use the POD jacket | 0 | 0 |
The reorder point is about two weeks of use. That covers our 1 to 2 working days of dispatch plus transit with room to spare.
We sell packs from 100 up to 1000, so you can buy close to what you use.
A pack of 1000 A4 envelopes would last this seller about 3 months. Before you jump to it, check the per-piece price on each pack size. It does not fall evenly with pack size on every variant. See the listing for today's price. Buying both sizes in one cart may also cross our automatic offers (5% above Rs 1,000, 7% above Rs 2,000, 10% above Rs 3,000).
What to watch
- Flaky recycled cartons. If the board comes off on your finger, the envelope will come off with it. Use a better carton face or add a copy inside.
- Heavy cartons get dragged. An envelope on a side face rubs against the floor of the truck. Use the top face.
- The monsoon. Let damp cartons dry before you pack. Wet board does not hold adhesive.
- Strapping. Keep the envelope clear of where the strap or rope will sit.
We would rather you measure this than take our word for it.
How would this seller know it is working? Count the "invoice copy bhejo" messages and the "one carton is short" calls for 60 days before and 60 days after. If they do not fall, look at where the envelopes are going on, not at the envelope.
We have made document wallets like these for export buyers in the UK and Australia for years. The problems of a carton going to Ambala are the same as those of a pallet going to Australia, and so is the fix.
What it would take in your business
- Split the orders of last month into single-carton, multi-carton and courier-bag orders.
- Count the pages of a typical invoice. More than one page means A4.
- Decide whether you need carton slips. If any order goes in more than one carton, you do.
- Work out one month of each size, add 5% and reorder at two weeks of stock.
- Watch the next 50 orders, then adjust.
We have written more on sizes and placement in our packing list envelopes guide. If you ship a few thousand cartons a month and want a regular supply, write to us with your order mix and we will work out the numbers with you.
Products in this guide
Prices are before GST. Free delivery across India on every order.
