We have put a hold on a cruise, and it appears that Princess might be able to tell what kind of credit this is, and limit it to Princess Excursions. So, it doesn't look like it is showing as usual Onboard Credit. That is okay for. us, as there is actually one that we would book.
So, I pulled up this HOLD, and it is specific in showing this as an 'Excursion Credit'.
It also shows the small Onboard Credit that came with the booking. But we have no other Onboard Credit that would be