The Postal Steward™ eVS Solution by Engineering Innovation, Inc. helps organize your electronic verification data before submission to the United States Postal Service, and presents the data to you after processing. 

Electronic Verification data provides tracking and identification information about specific mail pieces and mail shipments. This information is stored in a shipping services file (SSF), a file whose fields are defined in the United States Postal Services Publication 199. The Postal Steward™ website serves as a portal to view SSF data in a more user-friendly format, view shipment status, and manage the users that can access those files.

The web portal can be found at For more information on the Postal Steward™ website, contact EII customer support. For more information on eVS and SSF data, refer to Pub199, available at

Engineering Innovation, Inc.
Contact Information

Phone: 1-765-250-4100
Address: 3601 Sagamore Pkwy N
Suite Eii
Lafayette, IN 47904
USPS eVS Customer Support.
Contact Information
Phone: 1-877-264-9693