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When the buyer asks you to clarify your tender

The buyer has asked me to clarify or complete my tender. What can I change, and what would count as a new tender?

Checked
10 Oct 2026
Next review
10 Oct 2027
Sources
8
Scope
EU rules

Pricing ¡ This guide was generated with the help of an AI system. Its legal references were checked against the official EU texts listed under Sources on . Next review due by , or sooner if the law changes. EU rules only. Not legal advice.

Short answer. After the deadline, the buyer may ask you to “submit, supplement, clarify or complete” information or documents that are, or appear to be, incomplete or erroneous, or missing, unless national law says otherwise (Article 56(3)). It is a power, not a duty, and it must be used equally and transparently. The line the Court keeps drawing is simple to state: you may explain or correct what you submitted, and supply evidence of facts that already existed at the deadline, but you may not change your tender into a new one. Answer exactly what you were asked, within the time given, and don’t use the request to improve your offer.

EU law ¡ What Article 56(3) says

“Where information or documentation to be submitted by economic operators is or appears to be incomplete or erroneous or where specific documents are missing, contracting authorities may, unless otherwise provided by the national law implementing this Directive, request the economic operators concerned to submit, supplement, clarify or complete the relevant information or documentation within an appropriate time limit, provided that such requests are made in full compliance with the principles of equal treatment and transparency” (Article 56(3)).

Three features matter in practice:

  • “May”. The buyer can ask, but the Directive doesn’t oblige it to. National law can also restrict or exclude the possibility.
  • “Within an appropriate time limit”. You’ll be given a deadline to answer.
  • Equal treatment and transparency (also Article 18(1)). A request can’t single out one tenderer for help that others in the same position don’t get.

A request to explain a low price under Article 69 is a different procedure, with its own rules (see abnormally low tenders).

EU law ¡ What the Court has allowed and ruled out

Most of these judgments were decided under the earlier Directives, before Article 56(3) existed. They set out the principles that Article 56(3) now refers to. The Directive applied is noted for each.

Clarifying, correcting or completing a tender after the deadline
SituationWhat the Court saidCase
Asking tenderers to clarify their tendersAllowed, without requesting or accepting any amendment to the tender. The request must not appear, once the procedure is over, to have unduly favoured or disadvantaged the tenderer askedSAG ELV, C‑599/10 (2004/18)
Clarifying a tender or correcting an obvious clerical errorAllowed if the invitation goes to all tenderers in the same situation, all are treated equally, and the result can't be equated with a new tenderArchus and Gama, C‑131/16 (2004/17)
Documents the specifications required, not submitted in timeThe buyer may not invite a tenderer to submit themArchus and Gama, C‑131/16 (2004/17)
A document describing your situation that existed before the deadline (for example a published balance sheet)May be requested, if it can be objectively shown to pre-date the deadline and the documents didn't expressly say that its absence meant rejectionManova, C‑336/12
New documents to prove you meet the conditions, not in the initial bid (for example another entity's contract and its commitment to lend you its capacities)Can't be submitted after the deadlineEsaprojekt, C‑387/14 (2004/18)
The ESPD of a wholly owned subsidiary whose capacities you rely on, missing from the tenderThe omission may be rectified, unless national law precludes it, in compliance with equal treatment and transparency. The tenderer can't be excluded on that ground aloneC‑812/24 (2014/24)
A national "rectification" scheme with a feeNot precluded in principle if the fee is proportionate. But it can't be used to remedy a missing document whose absence the documents expressly made a ground for exclusion, or to make changes that amount to a new tenderMA.T.I. SUD, C‑523/16 (2004/18)
Labour costs not listed separately, as national law requiredExclusion without a chance to rectify is allowed if the requirement is clearly in national law referred to in the documents. If the documents gave no way to list them, the tenderer may be allowed to regularise its positionLavorgna, C‑309/18 (2014/24)

National law ¡ Where your country decides

Article 56(3) applies “unless otherwise provided by the national law implementing this Directive”. MA.T.I. SUD and Lavorgna both concerned national schemes. Whether your buyer can ask for a missing document, how long you get, and whether a fee applies depend on national law and the documents.

Our analysis ¡ Clarification or new tender?

The cases share one test: after the deadline, the buyer can find out what your tender already said or what was already true, but you can’t add something that makes your tender better or more compliant than it was. Some questions to put to any answer before you send it:

Checking your answer before you send it
QuestionIf yes
Does the answer change the price, the solution or a commitment?Likely a new tender. Don't send it as a clarification
Does it correct an error that is obvious from the tender itself (an arithmetic slip, a typo in a reference)?Likely a permissible correction, if the buyer asked
Does it supply a document that already existed at the deadline and only shows a fact that was true then?Possibly allowed (Manova), unless the documents made its absence a ground for rejection
Does it bring in a new resource, partner or reference you didn't rely on in the tender?Not allowed after the deadline (Esaprojekt)

This is our reading of the judgments above, not a rule stated in them. Borderline cases depend on the facts and on national law.

Practice ¡ Answering a request

  1. Answer the question asked, and nothing else. Extra material can look like an attempt to improve the tender.
  2. Meet the deadline. The time limit set must be “appropriate”, but you can’t count on an extension.
  3. Point to where the answer already is. “Section 3.2 of our tender states…” is the strongest kind of clarification.
  4. Show dates. If you supply a document, make it easy to see that it existed before the tender deadline.
  5. Check your own tender before submission instead. Missing signatures, the ESPD of every entity you rely on, separate labour costs where national law requires them: a checklist before the deadline is worth more than any clarification after it.
  6. Watch what others are asked. If you learn after the award that a competitor was allowed to fix something you were not, or to add something new, note the dates and raise it promptly (see after the award decision).

What this page doesn’t cover

Questions you ask the buyer before the deadline (see clarification questions). Explanations of a low price under Article 69. Utilities contracts under Directive 2014/25/EU, except where cited. National rectification procedures in detail.

Sources checked for this page

This page is re-checked when any of the following happens: an amendment to Article 56(3) of Directive 2014/24/EU; a Court of Justice judgment on clarifying, correcting or completing tenders. Spotted an error? See how corrections work.