What You Can Do to Help

Ask Before You Mail

Many common, everyday items are classified as hazardous materials. Determining the mailability of hazardous materials requires the consideration of a number of factors and can be very challenging. Please check with your local U.S. Postal Service® officials before attempting to mail any items that could be considered hazardous. Improper mailing of hazardous materials may subject you to civil and/or criminal liability.

Full responsibility rests with the mailer to comply with all postal and nonpostal laws and regulations regarding the mailing of hazardous materials.

Mailers are responsible for the following:

Further guidance on the packaging, marking, and mailability of hazardous materials is available from the following sources: