Why are you keeping the name of arbiter secret from the public?

Can you name the arbiter here in public? I'm sorry, being a sensible information, it is available to the authorities, to the OP and to the account owner only.

Can you categorically state you are not affiliated or connected with the arbiter in any way? We know the Arbiter but, by law, the arbiter MUST follow precise rules and it is legally binded to it

Why did you choose that particular arbiter and when was the first time you became aware of him/her/them? When we decided to transfer funds

But the real question is:  Why the OP doesn't require the information?  Maybe because he knows that the Arbiter will require full KYC proving he is not the owner of the account?  I believe this is the case.