When I asked the honda people at the time of delivery, they were like "Sir yeh company sy aisi e ati hain etc etc"
Actually in 2011 I was unaware of that cabin filter thing, I came to know after a year that my car also have a place for cabin filter and I was like "I just drove my car for a year without knowing about this thing" Khair its not a big deal.
Then while taking a delivery of my other City, I immediately asked the guy to check if the filter is there or not ? And his reply was what i wrote above.