Yesterday a letter arrived for my partner (not the father of my children) saying that as he earned over £50k that any child benefit that came into the house would incur a tax implication for him!
So I am not treated as a second class citizen by having to be told that my child benefit will mean he pays more tax.
I think common decency would be to have sent me some communication. We both earn and pay tax, but we are not treated as a single entity when it suits.