Finally, be alert to suspicious letters and packages. There are several signs that may indicate a letter or package is hazardous.

These include:

• Protruding wires or tinfoil
• Excessive security or packaging material such as tape or string
• Rigid, lopsided, or uneven envelopes
• Markings such as confidential, personal, or do not x-ray
• Excessive postage or weight
• Oily stains or discoloration
• Foreign mail, airmail, or special deliveries
• Postmarks from a city or state that do not match the return address