I'm trying to help my friend get out of debt (18g of revolving, among many cards, if you must know). I recommended he get a Chase Slate card, transfer all of his debt to it, and pay it down during the 18 months while it's interest free.

I was pretty shocked to hear that he 'forgot' that he already had this card, which he applied for maybe six years ago. It's still active. Is there any way for him to close the card, and re-apply to get the introductory offer?

The guy is a mess, I know. But I'm trying to help him out here.