How do I verify that my attachments were uploaded correctly?

My invitation letter status has not changed. Help!

Note that it may take up to 3 business days to update your letter status after we have received letters sent by your referees/sponsor. Please do not email or call us to ask whether we received your email until this time has passed. Thank you.

After uploading your files to your application, download [Right-click the filename, and click "Save Link As" (Mozilla Firefox) or "Save Target As" (Internet Explorer)] them from the application and open them in the program you used to produce the file. It should be the same file as the one you uploaded.