What should make me suspect a piece of mail? The United States Postal Service advises if:

• It’s unexpected or from someone you don’t know.
  
• It’s addressed to someone no longer at your address.
  
• It’s handwritten and has no return address or bears one that you can’t confirm is legitimate.
  
• It’s lopsided or lumpy in appearance.
  
• It’s sealed with excessive amounts of tape.
  
• It’s marked with restrictive endorsements such as “Personal” or “Confidential.”
  
• It has excessive postage.
  
• What should I do with a suspicious piece of mail?
  
• Don’t handle a letter or package that you suspect is contaminated.
  
• Don’t shake it, bump it, or sniff it.
  
• Put the mail piece in a plastic bag.
  
• Wash your hands thoroughly with soap and water.
  
• Notify local law enforcement authorities.