I am SE member and on July 7 I will be flying from MAD to YYZ in class J. My parents will also be on the same flight (they have purchased seats but are not in an upgradeable class but if I understand correctly, that shouldn't matter).

My question is...pending space availability, can I upgrade one of them to Executive First with a SW or SSW certificate? If so, I would certainly let both of them sit in Executive First (my class J and the upgraded one) and take my other parent's economy seat.