Premier members who are primary cardholders for certain Chase-issued credit cards are eligible for Complimentary Premier Upgrades when traveling on award tickets on United-operated flights.

If you hold a Mileage Plus Club Card or Explorer Card, does the card have to be used to pay the taxes or do you merely have to have the card to be eligible for the upgrade.

Is the upgrade supposed to clear systemically or (as rez suggested) are you added to the UG list at the airport only.

This benefit does not apply to companions traveling on award tickets.

If your SO has the same status and possesses their own Credit Card and you split the record are they eligible for the complimentary UG?

Does it matter what account the miles came from?

Or is it more important that you possess or use the card to pay the tax?