Identifying oneself means showing a photo that looks like one's face. In other words, if I asked Charlie, who is here, to identify me and showed him two documents with no photo, we would not get very far. Without a photo, how could he identify me?
There are no photos on the voters' list. In some countries, like South Africa, they take measures to ensure a given person cannot vote twice on the same day by putting a special ink on their finger that will not wash off for a week. I don't want to show you the wrong finger, but indelible ink is applied to that finger. That's a way of preventing people from voting twice.
We often talk about Morocco. Do Moroccan voters have to show an identity document bearing a photo?