Please, has anyone experienced the DpD delivery where a pin code is sent to you before delivery, which you then have to provide to the courier when he/she arrives with your parcel? I have doorstep deliveries, as I cannot open the door immediately. Do Dpd have to get you to key the number into their machine? Do DpD also expect a signature with this pin code system? Can I write the pin code number by the door bell with a request to leave the parcel on the doorstep? (I can show I am in by waving at the window).