Last year, I went to exchange credit with another university. During course registration, I applied for a graduate class in another department by purely clicking mistake. I explained that the school could not accept graduate classes and that I could not take more than my maximum grade point.
If it had been the way it was, I should have dropped the class easily, but my school abolished the drop system a long time ago. I thought that other schools would be like ours, and of course there would be no drop system at that school. I had no choice but to hold back my tears and decided to get an F grade.
It wasn't until recently that I learned that an F grade is a big problem in determining sincerity. I will take classes there again to erase this credit, but that does not guarantee that the F itself will disappear, or even I can get to that university again. I will also ask the professor to write a letter explaining the different administrative systems between the schools, but I don't know if this will work.
I know that many competitive schools drop students with F grades or don't offer scholarships. What should I do in my case? Will a letter with such a story work for the judges?