My wife got 6 eVoucher expired 30/06 and no travel is planed till than for her.
Can I use them? How to use them to upgrade Z class on Swiss (as I understand you can upgrade form Z to F on Swiss flight) but I can't use the tools for it.
Have your wife phone in and request the upgrades for you- your wife will need your PNR, the flight you want to upgrade, her M&M number, and her PIN. As long as the flights are available for upgrade and all the above information is available it will be done on the one phone call.