Originally Posted by
BrianWBrazil
I was hoping there was a dedicated quick-fire desk for this, rather than simply joining line of people with bags to check, in a situation where I don't have any (bags).
There is. There are visa check desks right by the entrance to North & South Security points - or, as also suggested, you can use any staffed Bag Drop desk where an agent will also be able to verify your documents.