In my school, all notes that give a change of where students should go at the end of the day need to be turned into the office in the morning, I created a system to keep track of any changes made. I simply print out, make copies of, and cut a bunch of these and keep them handy for such occasions!
When a student hands me a note from home or I receive an email from a parent, I fill one of these out and keep it with my dismissal clipboard until the end of the day. You can even teach your students to fill one out when their routine changes.
This document is completely editable to fit your classrooms need. Enjoy!