Corrigendum in a tender: what it changes, and why
Corrigendum. An official amendment the tendering organisation publishes after the tender notice, changing a date, a quantity, a specification or a document. It becomes part of the tender.
Checked against its sources on 23 September 2026.
What a corrigendum changes
Anything the organisation decides to change after publication: the closing date and the bid opening date most often, but also quantities, the scope, a technical specification, eligibility wording, or an added or replaced document. Several corrigenda can be issued against one tender, each amending what went before.
Because it amends the tender, a corrigendum is not optional reading. A bid that complies with the original notice and ignores a later corrigendum can be non-compliant with the tender as it stands on the closing date.
The mistake people make with it
Noting a closing date on the day a tender is published and never looking at it again. Extensions are the common case and cost nothing if missed, but a shortened scope, a changed quantity or a new required document costs a bid. The date you should work to is the one in the latest corrigendum.
The second mistake is reading the corrigendum as a standalone notice. It usually says only what changed, so the tender has to be read with every corrigendum applied in order.
Where to find them
On the portal that published the tender, attached to the tender itself. On CPPP the tender's own page lists its corrigenda. Since CPPP has no shareable tender link, the reliable way back to a tender is its Tender ID.
Where ScanX reads this for you
ScanX reads India's central, defence and PSU procurement portals every hour, reads each GeM match's bid document, and puts the fields that decide whether you can bid on the row your team sees.