Received an anonymous letter in Brazil. No sender, only a postal label
Unfortunately, this subreddit doesn’t allow image attachments. If anyone is willing to help, I’ll share photos of the envelope, the label….
I was able to decode the Data Matrix code on the label, which gave me a numeric code, but I have no idea what to do with it next or whether it can be used to identify where the letter was sent from or who mailed it. Any guidance would be greatly appreciated.