Reply To: What counts as a first adult passport? Home › Forums › General Passport Application Discussion › What counts as a first adult passport? › Reply To: What counts as a first adult passport? May 3, 2022 at 2:11 pm #13789 djbdaneParticipant When the child is over 16 they have to apply for their 1st adult passport – the fact they’ve had previous child passports is irrelevant – essentially they are different documents adult passports have a 10 year validity child’s only 5.