Facts checked on 27 October 2026. Published by MDG Services on 21 October 2026.
How a slip or coupon works
At a petrol pump it works much the same way everywhere.
- The pump gives the transporter a book of numbered slips.
- The driver brings a slip when the truck comes to fill.
- The nozzle man fills, writes the litres, and keeps the slip.
- Later, often at month end, the pump adds up the slips and makes a bill. The transporter checks the bill against his own copy.
Paper needs no phone and no signal, and everyone at the pump can read it. That is why many pumps still use it.
Where a slip stops helping
A slip records one fill. It does not hold the account. Some things follow from that.
| What happens | Why a slip cannot show it | What a good record adds |
|---|---|---|
| A customer is already near the limit | The slip says nothing about the balance | A limit check at the nozzle |
| A slip is lost or torn | The paper is the whole record | One line saved at the nozzle |
| The slip says 200 litres, the dispenser gave 220 | The quantity is whatever was written | One line typed from what the dispenser showed, which the transporter also sees, and a photo |
| The customer often sees the total only at month end | Slips are added up later | The transporter sees each line on the day |
| Nothing shows the transporter asked for the fuel | A slip shows fuel was taken, not that he asked first | The transporter asks first, by default |
For example, a made-up driver brings slip 412 for 200 litres and the nozzle man fills 220. The slip says 200, the pump's copy says 220, and nobody can say which is right.
What to use instead
Keep four things, on paper or on a phone:
- The transporter asks first. The request comes from him.
- A limit check before the fuel goes in.
- One line that both sides see: truck number, litres, rupees, who filled, time.
- A photo of the number plate or the slip, where you can.
How Khata Kavach does the same job
By default, the transporter sends a request from his own phone, one per truck. That does the slip's job of showing he asked. With no request, the light at the nozzle is red, "No credit", by default, and the nozzle man can fill for cash. With a request and the account in order, the light is green, "You can fill", and shows how much credit is left. The nozzle man types the litres and the rupees off the dispenser, adds a photo if he wants, and taps Done. Once the phone is online, the transporter sees the same line in his own app. See transporter requests and photo with a fill.
If you still use slips, type the number into the slip number box. For a side-by-side with a register or Excel, see paper khata or a credit app.
Questions people ask
01What is the parchi system at a petrol pump?
The customer's driver brings a numbered slip, the pump gives fuel against it, keeps the slip, and bills the customer later, often monthly. Until the bill, the slip is usually the record of that fill.
02Is a fuel coupon the same as a credit slip?
Sometimes. Some coupons are paid for in advance, which is a different arrangement from udhar. This page is about slips used on udhar, where the bill comes later.
03How do I keep track of lost or doubled-up slips?
Number every slip, note the number with every fill, and match the numbers against the bill.
04Can I keep my slip book and use Khata Kavach too?
Yes. The fill form has an optional box for the slip number. Type the slip's number there, and the paper and the app line can be matched later.
Related pages
About Khata Kavach (advertisement)
Khata Kavach is a shared credit book for petrol pumps, from MDG Services. The transporter asks before each truck fills, your nozzle man sees the limit before he fills, and both of you see every fill, payment and bill. It never lends or holds money.