1. Time & Location - where you took the taxi from AND your destination.

2. ask for his Employee number. They always wear ID tag

3. Ask for the receipt - all the details are there: driver/employee number, time and amount, etc.

4. Get the license plate number - that's important too.

WHY?

Taxi drivers have shifts and when you have all 4 (see above)information, it would be easier for the concerned people in Karwa management/admin to determine THE DRIVER.

From what I know, they do impose HEAVY FINES or pernalties for these offenses. Some get suspended, or sent home.