It makes some sense just to have a backup, especially if you’re dividing papers and recombining them. It’s not impossible that one could get misplaced or damaged.
replyAlso, you could have an issue where the exam somehow becomes relevant again after you’ve handed them back, and some students may not have kept their copies (like if one student successfully challenges their grade and you realize other papers were also misgraded).
In my (German) university in the 00s we weren't handed back the graded papers, but there was an office hours slot where you could visit and take a look at yours (under supervision I guess). I don't think I did that even once.
reply[dead]
reply