To be fair, this one could be an issue at Royal Mail's end. It's hardly the second Horizon scandal but they don't have the best track record with software.

(That said, it remains impossible to get 6x4 international shipping labels to print from eBay. After two years of making me try things and telling me it'll be fixed with the highest priority, they told me it's working as designed. This is also hardly the second Horizon scandal but they don't have the best track record with software either.)

Parcelfarce did about ten years ago, they started a new ground up system and spent millions on it, it didnt work so the stopped using it and sold it to DPD.

I think certain delivery offices get to a stage when they are so stacked out they call in extra staff to delivery and they havny got enough PDA's for them to use so they just tell them to get the parcels delivered and wing proof of delivery in the hopes no one will notice, also it can happen that some parcels can be given to posties on other rounds to deliver and they dont scan the parcels onto there PDA's so its not possible to zap them on delivery.