Whatever you say or do means you are ISO certified.

In mythology, truthfulness means that you do what you think or say. ISO therefore is a Vedic stamp for truthfulness. You need ISO certification in Kalyug as majority being Kalyugis will not be doing what they say or think.

In traditional old business times, transactions were done on verbal assurances but today every one works on written agreements. The saying was "Prana Jaye per vachan na jaye".