I've asked a few credit officers about this and was told adding a AU doesn't affect their underwriting decision. However, it DOES matter if you add a joint cardmember.
Credit Karma Score: 809 (6/8/13)
Credit Sesame Score: 795 (6/8/13)
J.P. Morgan Palladium ($100k x3) | AmEx Blue Sky ($50k) | Citi Dividend World Elite MC w/EMV ($20k) | Chase Sapphire Preferred Visa Signature ($25k) | Chase Ink Bold World Elite MC ($25k Flex) | Chase Freedom Visa Signature ($25k) | Chase Freedom World MC ($25k) | Chase MileagePlus Explorer Visa Signature ($15k) | Lexus Financial Services ($30k)
