４８５材料，請問小白兔和射線兄

今天受到要補材料的通知如下，
"On May 1, 2007, we mailed a notice requesting additional evidence and/or information in this case. Please follow the instructions on the notice to the evidence and/or information requested. This case will be held in suspense until we either receive the evidence or the opportunity to it expires. Once you the information and/or evidence requested, you will be notified by mail when a decision is made, or if the office needs something further from you. If you move while this case is pending, call customer service."
請問小白兔，射線，一般會要何種材料？雇傭信和工資單？我在兩個月內要離開現在的職位，會有問題麽？　
謝謝！