I had somebody from Resolvecall knock my door earlier. I know for a fact it wasn't for me but I kept an eye on the door. After some door bells and knocks he wrote two letters and enveloped them through my letterbox. Upon checking it was addressed to somebody else. A different address. I found it bewildering that my door number wasn't clear enough for the guy to read. It's as you look forward, my door numbering. Anyway I think I've broken some law by putting the two envelopes in the shredder. It's beyond me how he got the address wrong. Google results of Resolvecall didn't exactly yield good results but they do try