I had this at my last house all the time and it was frickin annoying making endless 18 mile round trips to the sorting office.
When I moved here within a week everyone told me “we have a really good postman” and I was slightly baffled – I mean how good do you have to be to put stuff successfully through a letterbox?
Then I found out.
He leaves stuff in useful places, goes out of his way to leave with the neighbours if necessary, chats to everyone and if a casual postie has mistakenly taken back to the sorting office he says “give me the card, I’ll sort it out and bring it tomorrow”
I give him a £20 tip at Christmas but he’s worth his weight in gold.