I live on 5 North street
I CONSTANTLY get packages for 5 South street (3 streets away)
I sometimes even get letters for 5 North street in the next town over
I also get regular mail for 4 other people who dont live here. One is clearly a scammer (loads of debt collection bills... I just pointed out Im not her it was easy and they stopped sending bailiff here) and the others are random.
One is personal handwritten and delivered letters/cards, that just randomly appear a few time per year. I held onto them for years thinking an ex tenent would come pick them up but the neighbors (several of who are elderly and have lived here 50+ year) claim to have never heard of the named person so after 10 years I opened the. Some even had money in (out of circulation now) I feel bad for whoever this family is they are clearly reaching out to their son/grandson thinking he is here but he isn't and it appears never has been.
One is DVLA stuff that comes to my house for someone else.
One is for some old couple, looks like pension documents, life insurance updates, bank stuff etc... from the envelopes but I dont open them, they just go in the bin now as I have no idea who they are (its not any of my neighbors).
The creepiest is the scientologist (the cult 'sea' branch where people go missing) recruitment stuff that keeps arriving under someone elses name.
Non sisnister... all been happening since before I moved in 12 years and nothing bad has happened.