If any of your groups courses require a file upload,  the documents appear in a que within the course upload verification feature.

Select the "course upload verification as shown in (1. Below)

Then your documents will appear in a list to be verified by a trainer with the details shown below:

1. The profile details of the user who submitted the file.
2. An option to accept the file and store it on the users profile.
3. Reject and send an email highlighting errors that need to be amended or
4. Skip to move to the next file that has been submitted/uploaded by a student. 

5. This space can be occupied by another image file for security purposes. ie if you require a video to be submitted you can include the users identification to compare with the user in the video.