Has anyone been asked to provide proof of residence when doing their standard 90- reporting. If so what is required. I have not been asked for anything for a long time. Only when I applied for a retirement extension did they ask for proof. Normally, I just take my passport, and they type something in their computer, and then attach a piece of paper in the back of my passport and I am off.

If you got a receipt with barcode on it there is no need to take "proof of residence" ( I would call it proof of address )

proof of address you can use Yellow book, Blue book ( tabian bahn ) or a rental contract.