Interesting, I was just put on my mom's credit card as a joint user(when she put me on as an authorized it never showed up) and the account is reported like its mine. The opening date corresponds with when I was 4. I just checked CE and my score jumped 13 points, but there was also a notice "Your date of birth indicates that credit may have been established before age 18." I guess its just lucky that I wasn't put on the credit card that she had before I was born. I wonder if that notice will have any effect on applying for future credit or if I can dispute it and get it removed. Any thoughts??
