Enrolling in CSOS

First-time users

Getting started

Step 1: Register for CSOS with the DEA

Each individual purchaser must enroll with the DEA to acquire a CSOS digital certificate used to sign electronic orders.

 Step 2: Receive your digital CSOS certificate 

Once approved by the DEA, you will receive your digital certificate(s) in approximately 6-8 weeks. 

  • Your certificate(s) will come by email or postal document, providing instructions for downloading your certificate to your computer.
  • To download, you must use either Internet Explorer or Firefox (Chrome is not compatible).

Step 3: Set up online 222 ordering through Express222.com

To submit your 222 form to MWI electronically through Express222.com, you will need to complete a CSOS set up with our team. 

Additional resources