Saurabh
Indirect tax evasion is rampant in Kerala. The fanciest of restaurants, hotels and shops will coolly hand you an "estimate" without any rubber stamp or sign. No proper invoices, even if you insist on one.

I hear that the Kerala government is projected to lose $1 billion in revenues due to prohibition. Shouldn't they be doing something about enforcement of sales and service tax? The Delhi Government has been running various schemes that encourage vendors and consumers to issue and demand proper invoices. I hear they're fairly successful.