We live on an entry road into a housing estate with a few cul de sacs off it. The road name is also a gardens, a crescent and a close, and for a while after our regular postman left, we, and a lot of our neighbours started getting the post for the corresponding house numbers at the other addresses. We made the postman aware of the mistakes but it kept happening so in the end we advised the sorting office - they must have had a word because apart from the odd letter, it stopped. We’re all different postcodes so I still don’t understand whether he was confused or just lazy.
The same thing still happens with deliveries and I’ve now given up complaining because seemingly the various carriers are incapable of rectifying it - we’ve now got the phone numbers of the corresponding house numbers at three other addresses so they can collect their parcels, and in a few cases, food deliveries !! Amazon are the worst - they ring the bell and leave the parcel on the step and by the time I get to the door they’ve gone.
I also sometimes have my parcels left at other addresses with photographs of someone else’s doorstep uploaded as ‘proof of delivery’. Nightmare.