Does the Phenom Phen consulate require an appointment for visa applications, or can you just show up?

People start queuing up about half an hour before it opens. Someone checks all your documents are correct (make sure you have a copy of everything required) and then they give you a form to fill in and a number. Then it's a matter of sitting in line and waiting for your number. Please note that it takes 3 working days to process, so you need to allow more time.