OK, still the weirdest thing ever to me. My wife and I have gotten literally dozens of Citi cards over the last 6 years and never gotten a call AFTER getting approved to verify information or anything else. Once approved, you are approved and they should have everything they need.
My question is not whether or not you have received anything from Citi in the mail but whether or not you received the welcome letter in the mail as that would use the same address you have on your application. Have you verified your address since applying? Maybe there is a typo?
Has anyone else ever gotten a call to verify information after getting approved?