I know that the pricing option for a supplier allows us to put payment terms, however it would be nice to have a way to see straight away in an itinerary supplier payments tab which ones will need to be prepaid compared to the ones that will invoice us after travel.

In Australia some suppliers don't automatically send us invoices unless we chase them up, even though they are asking for prepayment from us, and it is sometimes difficult to review an itinerary and not being able to see right away which ones we have to follow up on.