I went to a petrol bunk to get emission certificate for my car. This guy took the reading, gave me the certificate and asked for 80 Rs. I promptly asked him for the bill. Initially he told that they don't give the bill for this. I insisted for it and asked him to call the owner. Then he showed me the price list and took only 75/- which was the actual listed price. Felt triumphant for a minute :) I dont know if I should have done anything more, like alerting the owner?! He would have lost the job unless the owner is also part of it.
Guess he usually charged 80 Rs and pocketed 5 Rs..
hmm.. poor people.. they find a way to make quick money.