It all depends on your postie.
We had a wonderful lady called Michaela delivering in our village for years, knew all the people that were generally in to take delivery etc, never had an issue, even used to give her a tip at Christmas.
Anyway was chatting to her, from the gist of it RM are trying to manage out "the old ones" eg people who have been employed there a while, no doubt so they can replace them with people on cheaper terms.
They moved her to another area, apparently one with a bunch of pikies, and the new guy we got is terrible.
The road next to us keep getting our post etc, we were on holiday, and the guy put a missed delivery slip for a parcel, I thought it was odd, but anyway got home after a week, went to the post office few days later and picked it up.
It wasn't for us, but house round the corner and it was from the NHS as apparently quite urgent after chatting to the neighbour.
I also had another occasion, ordered 4 separate bits from eBay, just little things, 3 things turned up, then a few hours later another neighbour turned up with the 4th. I mean, it's got the same name and address on it, how can you deliver 3 to one address and the 4th to another? No excuse for that.