Addendum (amendment)

An addendum, called an amendment in federal contracting, changes a solicitation after it is issued: new dates, revised specifications, answers to questions. Federal amendments must go to everyone who received the solicitation before bid opening (FAR 14.208), and anything said at a pre-bid conference that changes the bid must also be issued as an amendment.

Bidders usually must acknowledge every addendum in their bid. Missing one that matters can make an otherwise good bid nonresponsive.

1. 01

   vs. Pre-bid conference

   Statements at a pre-bid conference are not binding until they are issued in an addendum. What is Pre-bid conference?

BidRover lists 6 open bids with "addendum" in the title right now. Newest first:

1. Addendum 2 BDC04-26/27 Suwannee River State Park – Bathhouse ReplacementFlorida, United States · Due Oct 27, 2026
2. Addendum 1 BDC04-26/27 Suwannee River State Park – Bathhouse ReplacementFlorida, United States · Due Oct 27, 2026
3. City of Dillon bathroom and concession addendum 1South Carolina, United States · Due Nov 16, 2026
4. Addendum 2 BDC08-26-27 Charlotte Harbor Preserve State Park - Maintenance Building ReplacementFlorida, United States · Due Oct 22, 2026
5. Addendum 1 BDC08-26-27 Charlotte Harbor Preserve State Park - Maintenance Building ReplacementFlorida, United States · Due Oct 22, 2026

1. acquisition.gov/far/14.208