• No return address or strange return address
• Postmarked from a city or state that does not match return address
• Marked with restrictions("Personal", "Do not x-ray", etc)
• Not sent to specific person
• Excessive postage
• Handwritten or poorly typed address
• Misspellings of common words
• Not addressed to specific person
• Incorrect titles or title without name

Appearance

• Oily stains or discoloration
• Strange Crystallization visible on wrapper
• Excessive pakaging material (tape, string, etc)Rigid or bulky
• Lopsided or uneven
  

What if you receive a suspicious envelope or package

• Handle with care - do not shake or bump
• Isolate package/letter immediately
• Do not open, smell, touch or taste