Dave, According to our list: Citibank = Equifax or TransUnion However, you should be aware that when you apply for a Platinum card from most issuers, they pull all three. When applying for a classic they usually only pull one primary report (actually get a score to base their decision). And that reporting agency usually depends on where you live. Citibanks app is online and approval is instant. http://www.citibank.com/ (ClickCard) Good Luck, Barry The List: www.creditmania.com/cconline.htm