Booked on LH web-page CDG-FRA-SIN on LH in late DEC. Called SEN-line in Scandinavia to be put on waiting list for earlier return flight. Waiting list was allowed but if it clears 100 EUR will be charged. I was told that the fare rules provides for 100 EUR fee for cancellation or changes. This is contrary to what was stated on the LH web-page when making the reservation "fully flexible and refundable" but fully in line with the normal rules for M class. I think we can't avoid the 100 EUR fee for canc. or changes once ticketed.
No worry; no remarks about the fare was made.