They kept saying it didn't match what was in my credit file. I heard the same thing from a few people. This started from my second application. The personal one appeared to be ok. They put me on hold for like 20 mins and application was approved. For my first biz card, I had to call them multiple times to get it approved. And last last biz app was denied like 3 times. I do think having SSN makes things much easier with Chase especially when applying for a business card. I also heard a couple of people saying Chase requested a copy of ITIN even when it was not the first app and got denied as the ITIN was too old. They also did not accept my ITIN last time on the business app (requested SSN).
I'm not sure but it could be that there is no ITIN in Experian? Chase mainly pulled Ex and they only pulled Ex on my last app while the previous 3 appl, they pulled Eq as well where my ITIN was listed.