不用快递的,你的补料信后面应该有解释的。我的补料信也有和你一样的话,但是后面写了这个
DO NOT send any original documents or provide paper copies of documents already attached to the web browser or sent by email, unless specifically asked to do so by your case officer.
我就是把公证的东西扫描了发过去的,不过现在还没有消息呢。