As an AU, you should be able to get it deleted. Ideally, Chase would do this, but you never know, as they're busy getting screamed at by irate former cardholders.
I would wait until the $400 is paid, and then call Chase, asking them to remove it. If they don't, you can then dispute the account with the three CRA's (credit bureaus) as "not mine." I'd do Chase first, though, because disputing with the CRA's can sometimes take unexpected and unpleasant turns.
And FYI, the notation of "Closed by grantor" that will show on your wife's reports will not affect her score in any way, and I doubt very seriously that it will bother future lenders. There are so many banks running around screaming "Off with her head!" these days (to quote the Red Queen in
Alice in Wonderland) that there's an excellent chance that anyone reviewing her reports has had an account closed himself/ herself.
I have an old store account marked "closed by grantor," and no one has ever questioned it.
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit?
FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007