These days those are mostly electronic, it's not hard to edit the text in a PDF to make it show a different address. Not something an average person can easily

These days those are mostly electronic, it's not hard to edit the text in a PDF to make it show a different address. Not something an average person can easily do, but trivial for a motivated attacker to pull off with a bit of money or the right friends. Also, if it has your name on it then it's no longer anonymous.