When you depart from halls of residence you will find the compulsory departure agreement on your envelope and/or via email. The QR code is also availed at all the receptions so you can scan and fill in the form when handing in your keys.
The agreement is your way of showing the accommodation team you have vacated your room and have returned it to its original state as per the arrival inventory.
The Compulsory departure agreement can be found here.
Please be aware when you hand in your keys/swipe card you will also need to physical sign to finalise the departure.