Hi,
I have looked around on FT (and also on DoC and other travel blogs) and haven't found an answer to this question.
If I add an authorized user to my C1 card, I do know that the card will be reported on the authorized user's credit report as well. However what I want to know is if the "opening date" of the card for the authorized user is the same is the primary user's date or is it the date of when the authorized user was added ?
Usually I would have assumed that the date on the credit report should always be the same as when the primary user opened the card. However, I've seen that in case of AmEx, that is not the case (it used to be but now the opening date for the AU for AmEx is the date on which they were added).
For Chase, it still seems to be tied to the primary user's opening date (based on the few cards I have). However, i don't seem to have a definitive answer for C1.
Can anyone who has added an AU to their C1 card confirm what gets reported as the opening date on the AU's CR.

thanks in advance.