Refusing to Sign a Polish Works Completion Certificate (protokół odbioru)

Your building crew or contractor has finished the job and puts a protokół odbioru robót (works completion/acceptance certificate) in front of you to sign — but you've spotted crooked tiles, a door that won't close properly, or wiring that doesn't match the plan. Do you sign "just to get it over with", or refuse? This question comes up in almost every renovation dispute, and the answer genuinely matters — among other things, it affects when the contractor becomes entitled to payment. Here's when refusing to sign is justified, how a material defect differs from a minor defect, and what a "one-sided" certificate means.

This guide is general legal information, not legal advice. How the rules apply depends on your contract, the evidence, and the circumstances — including whether the matter is consumer, civil, or business-to-business. If you need advice or representation, the matter should be assessed by a qualified Polish lawyer or another relevant specialist. Twoja Sprawa is an information and coordination platform, not a law firm — we help you organise the documents for that assessment and do not guarantee any outcome.

Key points

• A protokół odbioru robót (works completion certificate) is a document confirming that the work has been done and the condition in which it was handed over to the client — its contents can become key evidence in a later dispute.
• Refusing to sign makes sense mainly where there are material defects — ones that in practice prevent normal use of the finished work or make it inconsistent with the contract. Whether a given defect counts as "material" needs a lawyer's assessment and usually an independent surveyor's too.
• Minor, non-material snags generally don't justify refusing acceptance — they're normally listed in the certificate with a deadline for the contractor to fix them, while acceptance itself goes ahead.
• Signing the certificate without reservations can make it harder to pursue a warranty claim later — which is why noting defects directly in the certificate matters more than simply refusing to sign.
• A contractor can draw up a so-called one-sided certificate (protokół jednostronny) if the client refuses to sign — its legal effect and evidential weight depend on the circumstances and need a lawyer's assessment.
• Whether acceptance did or didn't happen affects when the contractor's fee becomes due — which is one reason disputes about the certificate so often turn into disputes about payment.

What a protokół odbioru is and why it exists

A protokół odbioru (completion/acceptance certificate) is a document in which both parties — the client and the contractor — confirm that the works have been carried out and handed over, describe their condition, and record any objections or defects. It serves two purposes: evidential (what exactly was found on the day of acceptance) and organisational (from what point other deadlines start running, e.g. for fixing defects).

Under a Polish umowa o dzieło (contract for a specific work — typical for flat renovations and smaller finishing jobs) and under an umowa o roboty budowlane (construction works contract — typical for larger projects governed by a design and a site log), the statutory warranty for defects (rękojmia) is set out in the Polish Civil Code, though the details differ depending on how the contract is classified — and that classification itself is often disputed and needs a lawyer's assessment.

Before assessing any case, it's also worth establishing whether the client is acting as a consumer (an individual for whom the renovation isn't connected with a business) or as a business (B2B) — this generally determines the scope of protection and whether the parties could contractually limit the statutory warranty. Don't assume "consumer rights" automatically apply to a business-to-business relationship; a lawyer should confirm this classification.

When you can refuse to sign the certificate — material vs minor defects

This is the key distinction in the whole topic. Polish practice and case law generally draw a line between:

• material defects — ones that make the finished work inconsistent with the contract to a degree that prevents normal use of it, or that would require such extensive rework that it's hard to say the contract was performed as agreed,
• minor defects — small snags and imperfections that don't undermine the usefulness of the finished work and can usually be fixed without major intervention.

Where there's a material defect, the client may have grounds to refuse acceptance — but that's a technical-legal judgment that should be confirmed by an independent surveyor and a lawyer, not simply the client's own impression that "something's wrong".

Where the defect is minor, practice tends to differ — acceptance goes ahead, and the snags are noted in the certificate with a deadline for fixing them. Refusing to sign purely because of a small imperfection can be risky and may be treated as unreasonably obstructing acceptance of the works.

How to properly record defects in the certificate, rather than simply not signing

In many situations, signing the certificate with clear reservations is more effective than an outright refusal to sign. It's worth:

• describing each defect separately — location, nature of the fault, and reference to the design or contractual specification,
• attaching photos or a sketch marking where the defects are,
• setting a deadline by which the contractor must respond to the defects raised (accepting them, or refusing with reasons),
• keeping a copy of the certificate with both your signature and the contractor's (or a note that the contractor refused to sign the version with your reservations).

A certificate signed "with reservations" tends to be stronger evidence than a bare refusal to sign with no written record at all — it shows that the client wasn't disputing that the works had been completed, only specific, documented defects.

One-sided certificates — what happens when the client won't sign

When the client refuses to sign, the contractor may draw up a one-sided certificate (protokół jednostronny) — a document describing the works and their condition, signed only by the contractor (sometimes noting that the client was present but refused to sign). Contractors typically rely on this to show that the works were completed and offered for acceptance, regardless of the client's position.

The legal effect of a one-sided certificate — including whether, and to what extent, it can stand in for the client's missing consent and affect when the fee becomes due — depends on the circumstances, the contract terms, and the reasons for refusing acceptance. This is a topic that needs a lawyer's assessment before taking further steps, for both the client and the contractor.

If you receive a one-sided certificate, don't ignore it — respond to it in writing (e.g. explaining why acceptance was refused and which defects had already been raised), so it doesn't look as though you silently accepted the state of affairs described unilaterally by the contractor.

The effect of acceptance (or lack of it) on when payment falls due

Acceptance of the works matters not just as evidence, but financially too. From the moment of acceptance (or events connected with it), it's often possible to work out when the contractor's fee becomes due, i.e. when the client should pay it. That's why disputes about whether acceptance happened at all so often turn into disputes about payment — the contractor argues the works were finished and offered for acceptance, while the client argues acceptance was rightly refused because of material defects.

The precise rules on how a missing signed certificate (or a refusal of acceptance) affects the timing and amount of the fee that falls due depend on the contract terms and how the defects are classified — this needs a lawyer's assessment, ideally before either party takes further steps (a payment demand, a demand to fix defects, or a possible court claim).

What to do before deciding whether to sign or refuse

1. Inspect the works before the acceptance date, ideally with someone who understands finishing works, and draw up your own list of objections.
2. Don't sign the certificate under time pressure — you're entitled to ask for time to inspect the finished work properly.
3. Document defects with dated photos and descriptions, whether you end up signing with reservations or refusing acceptance.
4. Consider whether a defect is material or minor — if in doubt, consult an independent surveyor or a lawyer.
5. Keep a copy of every document — the certificate, correspondence, and any one-sided certificate drawn up by the contractor.
6. Get legal advice on next steps before sending a demand to fix defects or withholding payment.

Frequently asked questions

Can I refuse to sign a works completion certificate at all?

Yes, particularly where you've identified material defects. The refusal must be justified by specific, documented defects rather than general dissatisfaction — whether a given defect meets that bar needs a lawyer's assessment.

Is signing the certificate with reservations better than refusing to sign it outright?

Often yes — it shows you're not disputing that the works were carried out, only specific, documented snags. A refusal with no supporting documentation can be harder to prove than a certificate with clearly recorded reservations.

What should I do if the contractor has drawn up a one-sided certificate I disagree with?

Respond to it in writing — explain why acceptance was refused and which defects had already been raised — and keep the correspondence. Assessing the legal effect of such a certificate needs a lawyer's input.

Does the absence of a signed certificate mean I don't have to pay for the works?

Not necessarily — it depends on the contract terms and whether the refusal of acceptance was justified by material defects. This needs a lawyer's assessment before you decide to withhold payment.

Need help with a situation like this?

If a dispute over a works completion certificate is turning into a dispute about defects or payment, it's worth organising your documentation before you write anything to the contractor. Describe your situation — we'll review it for free and point you to the documents worth gathering before a lawyer's consultation.

See also related guides from this section: - Statutory warranty and guarantee for defects in building works - Contractor won't fix defects — payment demand - Snags after a renovation — photos, expert opinion, cost estimate

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