你还是小心为妙，请看来自美国邮政总署USPS的忠告：

以下为一段引文，告诉你收到不是你的信件时该咋做，重点在最后标红的文字。

Reporting/Returning misdelivered mail 

Despite our best efforts, occasionally mail is mis-delivered, or is delivered to an old location for an individual. If you are receiving mail for the previous resident and do not know their address, simply return the mail piece back to the mailstream (by leaving in a Collection Box® or other mail receptacle) with the notation "Not at this address" marked on the envelope.

For other misdelivered mail items (such as letters):

• If the mailpiece is delivered to the wrong location:
  • Don't erase or mark over the information, or write any type of endorsement on the mailpiece.
  • Place the item back in the mailbox or hand the item back to your mailperson.

• If the mailpiece is delivered to the correct location but the recipient on the mailpiece does not reside at the address:
  • Write "Not at this address" on mailpiece.
  • Don't erase or mark over the address.
  • Provide the mailpiece to your mailperson or drop into a Collection Box receptacle.

 

Destroying mail that was not intended for you may be prohibited by US laws.

• Willfully destroying mail is an act that may be punishable by the Federal Government.

If you have any questions about the legality of doing this, please contact your local law enforcement

摘自：

http://faq.usps.com/