"Karl, I really need you to contact me urgently. Our landlord has been trying to get in touch with you about the window shutter that you broke whilst doing the final clean at our place in Muttenz. It seems that you didn't get it fixed as expected and they are now going to send me a bill - in any case your insurance should cover any costs rather than have me pay. Do you still have the shutter? The landlord has left messages for you on the contact number I gave her, but I don't know if you have received these, maybe you changed your number. I'm trying to get in touch with you via several routes but if you get this them Please get back to me asap"
Have been away for a few weeks but everything has been resolved now. Send me the bill as soon as you have it.