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
OK, so AF/KLM airport agents would cancel the ticket and (remaining) segments on the PNR, but then DL could find the ticket and would give a credit for its value (or refund) according to DL's fare rules and policies.
It still seems easier to call now rather than possibly have to fight later and spend even more time on the issue.