For anyone who's not checked the link, this is what it says
Accounts you can use to receive payments
The account will need to be one of the following:
•in your name
•in your partner's name
•both in your own and your partner's names
•in the name of someone acting on your behalf
•jointly in your own name and in the name of someone acting on your behalf
For tax credits payments only, you can also use an account in someone else's name. But it is up to you to make sure you get the money from that person.
You will see it says that for tax credits ONLY you can use anyone's account so you can see why I am confused as it clearly differentiates beteween someone acting on the claimant's behalf for Child Benefit and any old Tom, Dick or Harry for Tax Credits. I would be interested to see what HMRC do about the confusion