Originally Posted by
biggestbopper
Assuming the real deal here is kid who can't get card on own is pushing for mom to get card so kid can use miles @:-)-- yep, it can work, but, keep in mind that the big miles benefit is in the bonus miles (say 50K on AA Citi card--be sure to read thread on AA Citi deals) and most of those bonus deals these days require a minimum spend of $3-10K or so within around three months.
And, as mentioned above, miles will go to mom, not kid, even if authorized user. However, mom can use her miles to get a ticket for kid--would be nice to take mom along!
That's certainly some assumption...
There isn't really too much information in the OP. As others have said, authorized users don't earn points. In the case of AUs, the primary cardholder is responsible for all matters regarding the account, and the authorized user merely gets to borrow on the primary cardholder's credit.
To the OP: your "situation" isn't very clearly described, so I'm not sure how much advice we can really offer you more than what has been offered already.