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Hazmat Postal Shipper

Course Code: HMT 381

This course expands on the hazmat shipper's 49 CFR regulatory knowledge and covers the unique United States Postal Service (USPS) Publication 52 requirements for shipping hazmat by US Mail. 

Shippers who complete this online course build the in-depth expertise to identify which materials are mailable; which are prohibited; and how to ensure safe, on-time delivery of hazmat by mail.

Registration includes: 

  • Engaging, interactive hazmat training.
  • Relevant excerpts of the 49 CFR Hazardous Materials Regulations (HMR). 
  • Trusted compliance resources and references to simplify hazmat compliance.
  • Three months of Lion Membership for complete compliance support.
  • Certificate to demonstrate competence in USPS hazmat regulations.

Hazmat Postal Shipper Training Covers:

  • Categories of hazardous or “harmful” materials
  • What types and amounts of hazardous materials will USPS carry/deliver?
  • How to determine if USPS can accept your hazmat package
  • How to package, mark, label, and document hazmat by mail
  • Special exceptions for very small quantities
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Key Learning Objectives: 

  • Determine mailability of hazardous materials based on USPS restrictions
  • Properly follow USPS requirements (Publication 52) for hazmat shipped by mail
  • Describe how US DOT and USPS requirements relate to each other 

Online Course Details

Course code HMT 381
Compatible on Desktop or tablet
Duration 1 hour
Access time 90 days
Certificate issued Yes
Training required by      US DOT (49 CFR 172.704(c))

CEUs and Certification Maintenance

CEUs awarded 0.10
Lion Membership           3 months

See how Lion courses can help you maintain your professional credentials.


What's different about online training at

Professionals choose Lion’s online training because our courses are more detailed and more up-to-date than other training available.

Hazardous materials, environmental, and safety professionals rely on Lion for:
  • Courses developed and supported by credentialed, experienced trainers.
  • Materials updated continuously to keep pace with changing regulations.
  • Unrivaled training resources to simplify compliance and inform decision making.
  • Flexible, convenient solutions to fit any schedule or learning style.
  • Ongoing compliance support, including the Lion Finder Service

Online courses can be accessed 24/7, from any internet connection, with support available 7 days a week. Test drive a course or learn more about online training. 

Who takes Hazmat Postal Shipper training?

Small businesses, e-commerce shippers, and any organization that ships or returns regulated hazardous materials—flammables, lithium batteries, toxic substances, medical samples, dry ice, or any other regulated material—using the United States Postal Service (USPS) as a carrier.
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US EPA, US DOT, and OSHA increased civil penalties for violations of environmental, hazardous materials, and safety regulations, respectively. This guide puts all of these 2021 penalty figures in one place to help you demonstrate the value of effective compliance to your organization.

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Civil Penalty Increases For 2021