We live in Canada, where adult passport is issued at 16 years old.
All of our passports have expired, and we live in a border town, so having them is very helpful for quick jaunts.
My ex-husband has been a royal pain regarding anything to do with our son, so while he did agree to sign the passport application, he has demanded that there be full notarized itineraries delivered by recorded post to him so that they may be approved before our son may cross the border.
However, once he holds an adult passport, this "custody requirement" becomes a moot point - not that it is official, we have no formal custody agreement, as that would require him to actually pay CM. He is just a blowhard bastard who likes to thump his chest and get loud and threatening when he thinks he isn't controlling everything.
Was I unreasonable to conveniently "forget" to renew my son's passport until, say, Monday - his 16th birthday? Yes, it costs more than twice as much, but it is valid for 10 years, and his father can't limit his travel.
yeah, gotcha, blowhard! Stop screwing with your son's fun