When you are selected as the winner of a contest, you will enter the Contest Handover. This is the part where you will hand the ownership of your work over to the contest holder.
You might receive messages from the contest holder through the Contest Handover page (as seen below). The messaging feature allows both of you to communicate regarding any file changes the contest holder may request and the final submissions. To complete the handover, you should work on the revisions requested by the contest holder.
Once everything is finalized, you can then upload the revised files on the Contest Handover page.
When you upload and submit the files, the contest holder has to review them before accepting. Once the contest holder accepts and downloads the files you submitted, the Handover process will be complete and the contest prize will be released to you automatically.