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eOffer/eMod is a tool to submit Contract Offers and Contract Modification requests to GSA Federal Acquisition Service online.


What is eMod?

eMod is a web-based application that allows MAS contractors to electronically prepare and submit contract modifications to FAS.

When would you use eMod?

Currently, there are five types of modification request:

  • Additions
  • Deletions
  • Administrative Changes
  • Pricing Changes
  • Technical Changes

You can now choose multiple Modification types for a single Mod submission.

Then you will select the "Modification Sub Types" you want to submit. There are currently 40 different types. You can choose multiple sub types across multiple categories.

Modification Sub Type page

Who initiates it?

The contractor initiates the modification process.

What is the Purpose?

To streamline and expedite the modification process and to create an electronic modification file.

Learn about the eMod process

The eMod process has five basic steps.

Step 1 - Authentication

The vendor goes to the eOffer page. Once the vendor clicks the sign in button the application will check for the digital authentication certificate (digital certificate). After the digital certificate has been verified, the application will either grant you access because the certificate was found valid or show one of the messages below.

  • No Certificate: You do not have a digital certificate and need to purchase one before you can use this site.
  • Invalid Certificate: Your digital certificate has either expired or has been revoked. Please contact your certificate provider for more details.
  • Multiple Certificates: You have more than one digital certificate on your computer. You should choose the one you want to use and click "Continue".

If the vendor has multiple certificates on their computer, the application will pop up a window for the vendor to select the certificate they want to use and grant access if the certificate is valid.

Step 2 - Completing the Modification Request (eMod)

Vendor chooses the type of modification request they want to submit from a list of seven (7) types of modification requests. Then they complete the required information and add supporting documents e.g. pricelist and D&B report.

Step 3 - Submitting the Modification Request

Once the vendor is satisfied with the responses and supporting documents, they will click "Submit eMod Request". When this button is clicked it creates a proposal document that shows your responses. This proposal document is electronically sent to the Contracting Office along with all your attachments.

Step 4 - Negotiation

Once the eMod request has been assigned and reviewed by the GSA Contracting Official they will contact the vendor to begin negotiations.

Step 5 - Award Contract

After the negotiation process is complete, the Contracting Officer will create the modification package (all the files that will make up the final contract mod). Creating the package generates an email to the vendor, notifying them to go into eMods and sign the modification package. Once the package is signed by the vendor, it generates an email notification for the GSA contracting official to sign the documents. After the Contracting Officer has signed the documents, a notification is emailed to both the vendor and the Contracting Officer. The vendor can go into eMods and download the modification documents.