今天早晨收到INS的NOTICE，内容如下：
On September 11, 2006, we responded to your request for more information concerning your case. If you have not received our response within 30 days from this date, please call customer service at 1-800-375-5283.
请问这是何意思？是否需要我们补充材料吗？
千万个感谢！！！