I've read the last 5 pages, and couldn't find anyone asking this specific question:

I recently applied for a credit card that needs 3k spent in the first 3 months. I added an authorized user to that card. I don't want to use my card (the main one) in my AP account. That account is already busy meeting another CC spend requirement.

Can I add the AU card to the other AP account I have? The AU CC name matches the other AP account. Or does AP look at the name of the "owner" of that credit card, causing a mismatch?