回複：how do you know it's lost?

I check my case status for many times, and there is no information. So, I called DOS in D.C., the visa officer asked my case number and name, etc. finally, she said that they did not get my case and document. Then, I think I lost my case and documents.
According to your case, if my money was cased, my case should be shown on the web. BUT, it is not. So, I think the St.Louis lost my case.
I decided to remail all my documents and fee to them.
At my first time, I mailed my documents to address A without certification. Do you think that is the problem?
Thank you.