Should I add myself as an Authorized User on a credit card?Currently I have three tradelines (Barclays Bank, Capital One, Capital One). Only Experian shows all three, Equifax & TransUnion only show the two Cap One cards.I'm currently in underwriting for a new construction (not scheduled to be complete until June/July). I want to make sure my credit score goes up (currently mid. score is 642) before doing the final loan approval in 5-6 months but not sure what the best way would be. I can't apply for anything new but I could add myself to my wife's Capital One which is a 3 year old account with a $0 balance.Should I go ahead and do that? Will having another Capital One credit card on my credit report be beneficial? Any potential downsides?December 20 2012 - US00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.