It is 100% legal to open any first class or lower mail with your street address on it that the USPS puts in your mail box. Source: asked my attorney because fo

It is 100% legal to open any first class or lower mail with your street address on it that the USPS puts in your mail box. Source: asked my attorney because for the past three years running we've received the previous owner's W2 in the mail. First year I called the company and sent it back. We just shred it all now.