Maintain a heightened awareness for unusual things such as suspicious packages or letters. Some characteristics of suspicious packages and envelopes include the following:

• Inappropriate or unusual labeling                         
• Excessive postage                                   
• Handwritten or poorly typed addresses   
• Misspellings of common words               
• Strange return address or no return address                                                 
• Incorrect titles or title without a name      
• Not addressed to a specific person                     
• Marked with restrictions, e.g. “Personal”, “Confidential”, or “Do not x-ray”                     
• Marked with any threatening language     
• Postmarked from a city or state that does not match the return address