Originally Posted by Boulder

The table on the website (sorry, no link here) is pretty clear that, if you request the upgrade BEFORE integration, for a flight AFTER integration, you have to contact UA AFTER integration to pay the co-pay. You aren't requesting the upgrade again. Just paying the fee. If there's fee to be paid, then there's really nothing for you to do. Unless you want to call and get that warm fuzzy that you still have your upgrade.