Jump to main content or area navigation.

Contact Us

Verify: Engine and Vehicle Compliance System


This page contains links to various documents helpful for working with the Verify information system.

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.

To read files on this page, you might need:
   MS Excel reader for spreadsheet files Exit EPA Disclaimer
   MS Word reader for document files Exit EPA Disclaimer
   Zip archived files Exit EPA Disclaimer

Please contact us if you require accessibility help for these files.

Guidance Documents

For documents associated with the CDX account set up procedure, please read the Verify information system account set up information.

Top of page

Support Files for Current Verify Submissions

Common Services

Top of page

Emissions Defect Information Reports (EDIR), Voluntary Emission Recall Reports (VERR), and Quarterly Reports

Note: This section applies only to Light Duty Vehicle and Heavy Duty On Highway Engines.
Version (9) of Adobe Reader or Adobe Acrobat Professional, Version 7.0.2 or later, is needed to use the forms. See also Adobe Reader for PDF files for more information about Adobe Reader.

Motorcycle/All Terrain Vehicle

Light-Duty Vehicle

  • Data Requirements (XLS) (699K, December 2015) - Release 19.0
  • Schema (Zip) (82.9K, November 2014) - Release 16.0
  • XML Schema Change Log (PDF) (4 pp, 59K, November 2014) - Release 16.0
  • Business Rules (XLS) (864K, December 2015) - Release 19.0
  • Tier 3 Example CSI (PDF) (31 pp, 83K, October 2014) - Release 15.0
  • Tier 3 Example FFV CSI (PDF) (33 pp, 906K, February 2015) – Release 15.0
  • Submission Processing Reports Style Sheet (XSL) (4K, August 2008) - Release 4B.
  • Draft Manufacturer Users' Guide (PDF) (46 pp, 8.8MB, September 2008) - Release 4B.

Heavy-Duty Diesel

Top of page


  • Certification
    • Schema (Zip file of XSD) (22.7K, January 2015) - Release 16.0
    • Schema Change Log (Release 16.0) (PDF) (2 pp, 25K, January 2015) - Release 16.0
    • Data Requirements (XLS) (815K, January 2015) - Release 16.0
    • Business Rules (XLS) (657K, January 2015) - Release 16.0
    • Models and Parts CSV Template (XLS) (40K, November 2012)
    • Standards Decision Table (XLS) (120K, December 2014) - Release 16.0
    • Calculations Spreadsheet (XLS) (151K, June 2015) - Release 17.0

Non-Road Spark Ignition

  • Certification
    • Schema (Zip file of XSD) (17.4K, September 2015) - Release 18.0
    • NRSI Schema Change Log (PDF) (1 pg, 26.7K, September 2015) - Release 18.0
    • Data Requirements (XLS) (315.7K, September 2015)
    • Models and Parts CSV Template (XLS) (40K, August 2010)
    • Business Rules (XLS) (694K, January 2015)
    • Document Details (XLS) (30K, August 2010)
    • Draft NRSI Users' Guide (PDF) (46 pp, 4.9MB, August 2010)

Non-Road Compression Ignition

Top of page

Heavy-Duty Motor Vehicles and Engines

If you need to establish a Verify account, please go the Verify Information System Account Setup page.

Marine Compression Ignition. IMO

Electric Highway Motorcycle, Portable Fuel Container, Heavy-Duty Evaporative, and Snowmobile

  • Certification
    • Data Requirements (XLS) (646K, June 2015) - Release 17.0
    • Business Rules (XLS) (464K, June 2015) - Release 17.0
    • Verify Release 17.0 Software Release Notes (PDF) (2 pp, 56K, June 2015) – A description of the changes made to the Verify system for the Certification Module for Electric Motorcycle, Portable Fuel Container, Heavy-Duty Evaporative, and Snowmobile industries – June, 2015.
      • Verify Submission Templates for Electric Highway Motorcycles, Heavy-Duty Evaporative and Snowmobiles can be found here.

Top of page

Development (Draft) Documents

Heavy-Duty Diesel

Top of page


Top of page

This page is maintained by EPA's Office of Transportation and Air Quality (OTAQ).
For more: About Us | Get E-mail Updates | Browse the A to Z Subject Index.

Jump to main content.