State your protest here:

Include the following in your protest
• The correct lap,
• The cars (/teams) involved
• The lap/sector/time
• And a short description from your point of view.

Include a replay with at least 10s before and 10s after the event for which you protest (link). Additionally a movie of the incident may be useful as well, but protests have to include a replay.

Free sites to upload movies are: http://www.mediafire.com
http://www.rapidshare.com