Original itinerary
Keep both the inbound and missed connection booking.
Carrier statement
Request written proof of the reason and duration of the delay or cancellation.
Separate-ticket issue
If the tickets were separate, save both contracts and read the policy connection definition.
Replacement travel
Keep the new ticket and ground transportation receipts.
Cruise or tour proof
If a cruise or tour was missed, document the scheduled departure and how the traveler caught up.
Next step
Use the comparison guide and read the current policy certificate before relying on any benefit.