A man typing on a computer while holding up a credit card

I had a few conversations with a friend who decided to add a loved one to his credit card as an authorized user. Over the years, we had many discussions about some of the challenges he faced building his credit history as an immigrant with a thin credit file. He had been a joint account holder in previous situations, and now he was in a position to help someone else. Like my friend, I have been a primary account holder, joint account holder, and an authorized user, which lead me down this path to talk more to colleagues, do research, and write about piggybacking credit.