some buyers specifically dont wont to have to sign, as they are not home and can't get to their local PO in opening hours.

I have offered sign for delivery as an option and virtually no one ever opts for it. Since the introduction of Ebay labelling system I have had negligible parcels go missing altogether. Hardly anyone takes up express either.

sign for and registered at the end of the day is for seller protection not the buyers, as INR is buyers insurance