It is a criminal offence to impersonate, or to do anything which would imply you are an RBI (with intent to deceive), or to allow someone to believe you are, an RBI if you are not registered.
Mae hefyd yn drosedd celu, difa neu gael gwared fel arall â dogfen os yw ACC wedi dweud wrth berson ei fod yn bwriadu gofyn am gytundeb y tribiwnlys, ond nad yw wedi gwneud hynny eto.