ok i see what you mean now digital ghost, looks like things have changed quite a bit since i last had to deal with registered post etc. From memory there was only registered post which included sod, and tracking was seperate? But now sod is just proof of postage, but doesn't cover the buyer for loss, only the seller? but it seems like sod is useless if its a tracked satchel, or are all parcels now tracked? sorry still confused.

As a buyer i hadn't even thought about whether tracking/sod meant i was covered for lost items, & as a seller i dont want my buyers to lose out either. So for example it could be a satchel with tracking, they could knock on the door & leave it with someone who is a dishonest housemate of the buyer who then keeps item for themselves. Because there was no sod, the seller has proof of postage, but the buyer has no claim. Then even if its sent with sod the housemate could sign themselves, how does the postie know whos signing?