I posted earlier in this thread but I will post again, because at one point in my life (VERY embarrassed about it now) I was OP!
Ex high earner (6 figures), me a lower earner.
50/50 with the children although to be a tiny but fair on me, I do all the admin, buy uniform, coats, shoes, pay for sports clubs etc, sort appointments, exh never taken children ever to dentist, GP or anything so it’s not a true 50/50 but I digress…
I had the child benefit for both children, and also got a universal credit top up which helped with childcare etc.
There was an existing claim open with CMS actually, from before it went to 50/50. ExH tried to have it closed when it went to 50/50 (fair). But I stupidly I read up online and decided I must still be entitled to it, because he earns so much more and also I was providing more for the kids as above.
When I fought back on the claim being closed- he was advised by them that it goes off who has the child benefit, so that’s why he put in a rival claim.
The child benefit was stopped after a month, put on hold while it was all sorted out. It took an age- he was awarded the benefit for one child, and was able to have that child removed off the CMS claim from that.
I appealed the child benefit decision, I send a bundle of evidence to prove I was supporting the children more despite 50/50- I was even paying for after school clubs and school dinners on his time! School trips etc. all evidence of GP, dentist, school address. I also noted their own decision making guidance where the financial impact can be CONSIDERED (as other posters have said).
My appeal wasn’t successful and he still got awarded one child.
I lost the child benefit, and also the universal credit element for that child too. I was financially so much worse off, it was an awful time.
I still got maintenance for one child, but eventually I agreed with exh that if I closed that he would let me claim the child benefit again, and I got my universal credit back for that child.
On the plus side we now have a much better relationship and he accepts that I pay for far more for the children than him, and even though we have 50/50 he pays maintenance every month voluntarily. So alls well that ends well.