If the assignment is online, there's absolutely no need for the teacher or grader to know the name or ID of the student at all. If its offline, there can be an ID assigned which can change randomly.

In some exams I've sat for, they used IDs to avoid people cheating or playing favorites.

>In some exams I've sat for, they used IDs to avoid people cheating or playing favorites.

Yep, that is standard practice for many exams, but here we are talking of "common assignments" in a school.

My note was about the fact that writing the name on the document (be it electronic or paper) but at the end of it, is very simple but not a solution to anything, if you prefer is a simple non-solution.

Also, stupid solution because we can recognize a women's handwriting vs a man's with high accuracy.