New passport

[brokenhearteddad]

Can you someone in the know please advise
Finally the ex has added an additional middle name to my son (my dads name) via deed poll we have had to do it this way because she wouldn’t do it until after 12 months which i then found out couldn’t be done on the birth certificate. I’ve been told by the registrar that when my son gets his new passport he will have to go by the name he is now known by but the ex has told me she has spoken to passport office and they say that whatever is on his birth certificate is required
So anyone give me a definitive answer please?

I can give you a definitive answer, though I am so deeply offended by the term "The ex" I can barely bring myself to do so. I am aware, however that this is on the Travel topic, not AIBU, so will try to stick to the matter in hand.

As your son's name has been changed/added-to by deed poll (presumably with the agreement of his mother) then his new passport can be issued in his new name, using the deed poll as evidence.

You do not need to wait for your child's current passport to expire, if you are willing to pay for a new one now. You can apply online, but you must then print out the application and send it to the passport office with appropriate photographs and supporting documents.

Surely you would fill in the passport application with the name you want to use and then send the birth certificate and deed poll as proof of the change. My niece has a passport that has a different surname to the one on her birth certificate so it can be done

She is now refusing to use his new “known” name because she believes she doesn’t need to.

It's a middle name so it won't really be used much anyway.

Do you mean use it on his passport? Why did your son's mother agree to the addition of a middle name at all, if she would rather not include it on his documents? Did she misunderstand that that was what generally happened?

Or do you mean she is refusing to use it in general/spoken day to day use? I think that is probably perfectly usual. People often do not use/acknowledge middle names in general use.

She agreed to it being added and is now refusing to use in future for such use as passports or official documents etc
I’m just trying to establish if what I’ve been told is correct or what she has been told is correct