Your Commune Runs the Process
Applications go through the local administration.
A Belgian passport is applied for at the population service of your own commune, gemeente or Gemeinde, depending on which language region you live in. The federal government sets the photo standard; your municipality is the counter that applies it.
In practice that means the check happens locally, and communes differ in how strictly and how early they assess a photo. Some will look at it while you wait; others accept it and reject it later. Check your commune's own page for the appointment you have booked — and if you are abroad, the consulate handling your application sets its own intake rules.
