What should I do if a zero is posted for an assignment that I know I did?

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Check the graded papers tray for your class period.  If your paper is there and graded, return it to me so that I may correct the posting error.  If it is not there, check the no name papers tray.  If you find it write your information on the paper and return it to the turn in tray for your period.  I will post it with my next round of grading.