On Team-BHP, I read of a guy buying an AC from one of Chennai's biggest suppliers. There was a problem after installation, and the manufacturers said, "It was not installed by a registered installer: no warranty cover. End of story as far as we are concerned." And this was not even an online buy.
What are we supposed to do? Ask, "Are you an authorised dealer?" Hah, the answer is surely never going to be no! Are you a registered installer? Of, of course, sir.
What are we supposed to do?
Sorry if AC units from actual stores is going off-topic, but it all part of the authorised-agent picture