@tausifs
Bro you have some misconception about tires. Tires that reached in any country is genuine and authentic if their DOM and other information is properly written by company regardless of channel either smuggled or imported and packing stuff. Through both channels, genuine tires will come in respective country- you have to check on DOM and other information.
FYI the shop you tell us here neither is company operated nor official dealer of Yokohama-even in ISB/RWP there is no official dealer /partner available. So hence no official warranty provided.
What they did they only printed their own warranty cards that's look like official ones and giving fake warranty card with ripping price and say " this is genuine tire- we import it although every shop has smuggled tires. The proper imported tires having price of 15k or more of single tires.
If you ask them to see you custom fees certificates and other charges papers, they will never have these because each tire shop has smuggles tires.