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.
看了 iw8ben Form Instructions.pdf,似乎还是不勾选为好,或许根本就应应该勾选。
If you check this box, you must provide the withholding agent with the required statement for income from a notional principal contract that is to be treated as income not effectively connected with the conduct of a trade or business in the United States. You should update this statement as often as necessary. A new Form W-8BEN is not required for each update provided the form otherwise remains valid.