Federal law, specifically the Equal Credit Opportunity Act, provides for the addition of authorized user tradeline, without regard for the relationship between the parties. Tradelines are avaialble to all credit consumers and there is no legal restriction placed on your ability to access this service. Credit reporting organizations will consider authorized user tradelines no matter what your affiliation is with the other cardholder.
The Equal Credit Opportunity Act (ECOA) is a United States law (codified at 15 U.S.C. § 1691 et seq.), enacted in 1974, that makes it unlawful for any creditor to discriminate against any applicant, with respect to any aspect of a credit transaction, on the basis of race, color, religion, national origin, sex, marital status, or age (provided the applicant has the capacity to contract);[1] to the fact that all or part of the applicant’s income derives from a public assistance program; or to the fact that the applicant has in good faith exercised any right under the Consumer Credit Protection Act. The law applies to any person who, in the ordinary course of business, regularly participates in a credit decision, including banks, retailers, bankcard companies, finance companies, and credit unions.