Hi all

Say if my corporate travel agent issues a Economy class ticket. Will it be possible to pay the fare difference to upsell to "i" class ?

I.e. I know MH for instance doesn't allow upsell to "Z" class as they must be fresh booking only.

seeing some good KUL to HKG biz deals so thought of paying the fare difference with the airline directly after my travel agent issues the Econ ticket as I can't buy Biz outright.