Join Date: Aug 2015
Location: DXB
Programs: AA EXP, A3 *G, LH SEN, SK EBG, Marriott Titanium, Hyatt Globalist, Hilton Diamond, etc. etc....
Posts: 3,349
You can also usually change the frequent flier number during boarding, at the gate. Not ideal, but I've sometimes had to resort to it when I couldn't add it during OLCI.