RFI, RFP, RFQ & tender documents · Core
Addendum
Also called: contract addendum, tender addendum
ELI5
A formal change or supplement to solicitation documents.
Used in conversation
“Which version of addendum should the board treat as current?”
Pitch context
You will see “Addendum” in operating plans, procurement packs, supplier reviews and supply-chain reports when the discussion reaches rfi, rfp, rfq & tender documents.
Why it matters: In rfi, rfp, rfq & tender documents, a loose definition can change rights, obligations, approval, disclosure or enforceability.
Caution
Meaning, enforceability and required process vary by jurisdiction and agreement; this definition is not legal advice.
Sources & evidence · 6
Direct term-level sources and supporting source families.
- U.S. Acquisition.gov — Federal Acquisition Regulation Part 15 — Contracting by NegotiationDirect source · primary · checked 2026-08-16
- UK Government — Groceries Supply Code of PracticeDirect source · primary · checked 2026-08-16
- OECD — G20/OECD Principles of Corporate Governance 2023Supporting source family · institutional · checked 2026-08-16
- U.S. Securities and Exchange Commission — EDGAR and filing resourcesSupporting source family · primary · checked 2026-08-16
- National Institute of Standards and Technology — Computer Security Resource Center GlossarySupporting source family · primary · checked 2026-08-16
- U.S. Bureau of Labor Statistics — Productivity programmeSupporting source family · primary · checked 2026-08-16