Got a letter in our letterbox the other day. It was purportedly from the real estate company that manages the apartment we live in. It said "Starting next month we would like you to change the bank account that you transfer money to". My wife was just going to do it because the letter looked legitimate and even seemed to have a stamp from the company (in Japan stamps are used instead of signatures). I stopped her and asked her to call the real estate company (using the number we already had on file) for confirmation. I pointed out that the stamp appeared to have been printed on the letter, not actually stamped. Indeed, it turns out to have been fraud. The real estate company had no idea about the letter.