Moderator: Lufthansa Miles & More, India based airlines, India, External Miles & Points Resources
Join Date: Dec 2002
Location: MUC
Programs: LH SEN
Posts: 48,187
They don't mark anything in the system, so if the gate forgets to collect it they are SOL. If the cert was filled with your details already, no agent will touch it in the future. The gate agents in BOS told me a story that innovative 1Ks fished out SWUs kept at the desk during boarding, so to prevent that they write 'USED' with a red marker on the certs after use.