Hello,
Just got email notice from CIS as below,
Your Case Status: Request for Evidence
.... we mailed a notice requesting initial evidence in this case. Please follow the instructions on the notice to submit the evidence requested. Meanwhile, processing of this case is on hold until we either receive the evidence or the opportunity to submit it expires. Once you submit the evidence requested and a decision is made, you will be notified by mail. If you move while this case is pending, please use our Change of Address online tool to update your case with your new address or call our customer service center at 1-800-375-5283.