Please check with local Postal Service™ officials before attempting to mail any of the items noted in this publication. Remember, it is your responsibility to ensure that articles you present for mailing comply with all Postal Service regulations.
Improper mailing of hazardous materials or dangerous goods may subject you to civil and/or criminal liability.
Dangerous goods are substances that when transported are a risk to health, safety, property or the environment. Certain dangerous goods that pose risks even when not being transported are known as hazardous materials (abbreviated as HAZMAT or hazmat).
