A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
It sometimes works the other way. If you don't get PreCheck on a boarding pass for flights returning to the USA, trying to reprint at the kiosk after clearing customs can result in PreCheck being there.
My personal rule is that whenever my boarding pass doesn't show PreCheck, I just try to reprint it several times using different methods: OLCI, OLCI redo from a different computer, iphone, kiosk, airport agent, etc.