I have seen some contests that have this term and condition:
Your photos should not have been submitted for other contests or competitions before.
I am always curious about this condition. Why is it that a contest organizer will be so concern if my photo has been entered into another competition before. If the photo have been submitted for past competitions and didn't win anything, surely I should be able to submit it for future competitions right? And if my photos did not win in the past contests, who would even know that it has even been submitted before?