Originally Posted by ernestnywang

It's complicated. If the airline you hold FFP with happens to be the airline you check-in with, you should be fine. If not, I guess you are out of luck. I remember CI has (or had) a rule where if a CI elite checks in with another airline who charges you over-weight fee on a connection CI segment, CI will refund the elite the portion CI got. Don't know if it's still the case after CI joins ST, though.