Babies don’t require a passport to travel. Doesn’t this just mean that you could potentially kidnap babies from other countries bring them to your country illegally?
I needed a passport for my 6-week-old son in order to bring him from one part of the UK (Birmingham) to another (Belfast) for my parents’ 40th wedding anniversary.
I was taking him to another country (Irish Republic), but not having to go through a manned border, I didn’t need a letter from my husband saying he knew about it and agreed that it was okay for me to take our child out of the country. There’s no way I could have just nabbed a baby and taken it between Birmingham and Belfast, much less any other part of the world.
Battle Pedant 