收到银行一个这个表，要填了填了字返回去，说是表明不是美国公民，所以可以免税。
。。但其中有一项不明白是不是要CHECK，这项是PARTIII Notional Principal
Contracts
11. I have provided or will provide a statement that identifies those
notional principal contracts from which the income is NOT effectively
connected with the conduct of a trade or business in the United States. I
agree to update this statement as required.
啥意思啊这是？需要CHECK这项吗？
