I got this address a while back
I posted a similar question on this site a long time ago, and someone gave me this U.S. address (sorry, it's the only one I have). The lady that gave it to me said something like it has to be unique to be forwarded to the band in England. I don't know what criteria they use, but I'm sure the nicer gifts or artwork of the band are probably sent to them (or I would think so). I've never sent anything, because I don't think my letter would be interesting enough, but, like a nerd, I keep this address in my address book.
The Cure c/o Staff Member
Creative Artists Agency, LLC (CAA-LA)
9830 Wilshire Blvd.
Beverly Hills, CA