And I would also request all that when you are refuelling your rides; do not fix the amount in Rs., or quantity in Litres, etc. Just ask the guy to start pouring in the fuel, and when you see that the required amount / quantity of fuel has been poured, you may ask the guy to stop.
Best thing is to always get fuel tank filled up to the mark.
I would also urge all to be very vigilant when fuel is being poured, and also take care that quantity of fuel, and equivalent amount is Rs. go side by side. If you see that quantity and its price are not matching with each other, immediately get alarmed that some hanky panky has been done.