If you buy a NIOD or get one from a raffle table, friend, etc., you're going to have a very hard time trying to ID it. If you lost a tag or the tag has faded, then you can hopefully wait till it blooms, and go back to your purchase lists or vendors and see if you can figure it out. Keeping your own orchid plant list is highly recommended, but at least keep all your purchase receipts with names. Many orchid hybrids are so similar that they are almost impossible to tell apart, and as you grow into a serious collector, you tend to avoid NIODS, and they are the first to get disposed of if they are not doing well or you're running out of room. You can always post a pic on this or other forums, and sometimes you'll get lucky with an ID...but you shouldn't enter a plant for judging if your not certain of its name.