Star_world From Ireland, joined Jun 2001, 1234 posts, RR: 0
Reply 1, posted (12 years 5 months 2 weeks 3 days 5 hours ago) and read 1350 times:
It's an upgrade cert issued by United for its highest-level elite (1K) flyers. If you fly 10,000 miles per quarter as a 1K with United you'll get issued with two of these. They are valid for a one-way upgrade on any UA flight within mainland US, including connecting flights. The important point about these is that they are not time-verified - the upgrade can be confirmed at time of booking, in the same way as the Systemwide Upgrade (SWU) certs.