I will get the ball rolling with a disclosure I use in my own courses. Over the years I have found that students sometimes come to me and point out inconsistencies in my marking, where two students have given similar answers and got different marks. While I aim for consistency, sometimes I get a case where I have indeed marked inconsistently. If the lower mark is too harsh then this is a simple fix --- just raise it to the higher mark. However, if the higher mark is too generous then an incentive problem arises --- do I mark a student down for coming to see me with a marking inconsistency? My own view (which some may not share) is that I don't wish to disincentivise my students from raising legitimate marking queries, so I have made it a policy that I will leave the inconsistency in place, rather than marking the higher student down. If the student specifically asks me to correct the mark and mark them down for consistency then I will do so, but I won't do this unless they request it. To put students on notice of this policy, I include the following section in my course outline:
Review of Marks and Consistency of Marks
The course lecturer will make every effort to mark all assessment items in a manner that is consistent from student to student. If students believe that there is an inconsistency between the marking of their own work and the marking of another student’s work (e.g., they get different marks for an answer that is substantively the same) then they should raise this with the course lecturer for review.
The only exception to this consistency principle is this: if the course lecturer finds that a student has accidentally been awarded a higher mark than should have applied for a question, or overall, during subsequent inquiry on the matter by students, the mark will not be reduced, except on request from the student. This is done in order to avoid creating any disincentive for students to discuss marking issues with the course lecturer (i.e., students do not have to worry about raising issues of consistency and then being marked down as a result).