At TradelineDeals.com we answer your calls.  By adding your name as an Authorized User (AU) on one of our high limit, low balance credit cards with a long and perfect payment history, the account history for that credit card appears on your credit report. It looks like that credit card’s history has been there since the account was first opened whereby you benefit from this “coincidental benefit” that gives you an immediate FICO® credit score boost. An AU is someone who cannot use the account, cannot make any changes to it, nor do they have the responsibility to repay any balances that might be owed.