My children all have double barrelled surnames. But me and father are no longer together and he has had no contact for 4 years. My question is legally do i need to use both surnames or can we just drop his on certain documents this is the childrens decision as they dont associate themselfs with him anymore. The school has been very helpful and will only use my surname for the children after i explained how upset there where having both. Only one is old enough to change her name by deed poll which is plans to do. Im sure i got told i could pick which names they use but will this be allowed on passports