Join Date: Jan 2005
Location: New York, NY
Programs: UA, AA, DL, Hertz, Avis, National, Hyatt, Hilton, SPG, Marriott
Posts: 9,452
My money says they won't honor them, but it's worth trying. I would not change any existing reservations, though, unless on UA metal where agents can manually overbook I/O in the event these get bounced.
In my experience, there is usually a lag with SQ in getting *A partner award flights ticketed, so even if you have a record locator from UA, it does not mean your SQ segment has actually been issued.