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    Legal Due Diligence

    We investigate the target of your transaction — a company, a property or a portfolio of assets — before you buy it, sell it, invest in it or finance it. You know what you are buying and at what price.

    Home Services Legal Due Diligence

    We investigate the target of a transaction — a company, a property or a portfolio of assets — before you buy it, sell it, invest in it or finance it. Transactional legal due diligence looks at someone else's target from the perspective of a party to the deal: we work out what you are really buying and at what price, and where the risks that later hit that price are hiding.

    The scope of the review follows the structure of the deal. Buying shares (a share deal), where you take on the company with its entire history, is examined differently from buying selected assets (an asset deal), where the law adds automatic succession mechanisms. So we always start from how the transaction is arranged, not from a ready-made checklist. We run full mergers & acquisitions mandates, but you can also commission due diligence on its own — a red-flag review before a decision.

    The findings are your ammunition in the negotiation. We turn every defect we find into something concrete in the contract: a lower price, representations & warranties, indemnities or a condition precedent. That is what separates transactional due diligence from a preventive business legal health check, which you run on your own company, with no transaction in play.

    What we do

    Deal structure & how we work

    Share deal or asset deal — structure drives the review

    We first work out what you are buying. In a share deal you take on the company with everything — its debts, disputes and tax history — so we look at it backwards. In an asset deal you take selected components, but the effects depend on what is acquired: a transfer of part of the workplace triggers art. 23¹ of the Labour Code (a transfer of an undertaking), acquiring the enterprise brings liability for its obligations under art. 554 of the Civil Code, and acquiring the enterprise or an organised part of it brings liability for specified tax arrears under art. 112 of the Tax Ordinance.

    How we run the review: data room, materiality, report format

    We start from the scope and materiality thresholds — we don't examine everything, only what genuinely affects the decision and the price. We work in a virtual data room (VDR), run a structured question list (Q&A) to the seller, and give you the result in an agreed format: a fast red-flag report or a full report, workstream by workstream.

    From findings to the contract

    From a red flag to the contract: price, warranties, indemnities

    We trade a defect found in the review inside the contract. We can cut the price, shift the risk to the seller through representations & warranties and indemnity clauses, make closing conditional on the defect being cured (a condition precedent), or insure the deal with a W&I policy. Representations and warranties are a contractual construct (art. 353¹ of the Civil Code), not the statutory warranty — so their wording comes straight from the red flags.

    Title to the shares and corporate standing

    Before we establish what the company owns, we check that the seller has clean title to what they are selling. We trace the chain of acquisition of the shares, capital increases and resolutions, encumbrances over the shares (pledge, usufruct), transfer restrictions (pre-emption rights, required corporate consents), and the consistency of the National Court Register (KRS) entries and the validity of board appointments.

    Real estate & regulation

    Real estate: legal title, land register, restitution

    For a property, or a company that comes with one, we examine legal title separately: the state of the land and mortgage register, the difference between ownership and perpetual usufruct, encumbrances (mortgages, easements, lease, pre-emption rights), zoning under the local plan, and environmental risk — and, especially in Warsaw, the risk of restitution claims.

    Concessions, permits and sector regulation

    Many businesses stand on administrative decisions. We check whether concessions, permits and entries in registers of regulated activity are current and whether the transaction extinguishes them — because in an asset deal many permits do not pass to the buyer automatically and have to be obtained afresh. We add compliance with the target's sector regulation.

    Contracts & people

    Key contracts: change of control and assignment bans

    The most common quiet trap in a transaction: contracts the counterparty can terminate, or that lapse, when the owner changes (change-of-control clauses), and contracts that cannot be transferred without the other side's consent (an assignment ban, art. 509 of the Civil Code) — an issue especially in an asset deal. We also review contractual penalties, exclusivity and the risk of losing key customers and suppliers.

    People: art. 23¹, social fund, B2B risk

    Employees are a liability: in an asset deal, where a workplace or part of it transfers, art. 23¹ of the Labour Code applies (a transfer of an undertaking); in a share deal they stay inside the company — either way it has to be priced. We review pay and contribution arrears, collective agreements (for a year after the transfer the new employer applies the previous provisions to transferred staff), management contracts, non-compete clauses and the risk of reclassifying B2B contracts as employment (back social-security contributions and tax).

    IP & disputes

    Intellectual property: does the company own what it stands on

    We check that the company really holds the rights its business rests on: the full chain of assignment of economic copyright and the specified fields of use, trademark and patent registrations and their encumbrances, and above all IP created by freelancers and software houses. A missing written form or missing fields of use is a classic red flag — the company may not own its own software.

    Disputes and contingent risks

    Pending and threatened disputes are future costs, plain and simple. We review court, arbitration and administrative cases (as claimant and defendant), enforcement, disputes with authorities (tax, UOKiK, the data-protection authority) and claims raised but not yet sued. We size the likelihood and the monetary exposure, and pin a known dispute to a specific indemnity in the contract.

    Transaction clearances & data

    Transaction clearances: merger control, investment screening, FSR

    A transaction can hinge on clearances that are a condition of closing and stretch the timetable. We check three regimes: a merger notification to the President of UOKiK (where the deal is a concentration and turnover thresholds are crossed — EUR 1 billion worldwide or EUR 50 million in Poland — absent a statutory exclusion), foreign-investment screening — run since 24 July 2025 by the minister responsible for the economy, not UOKiK — and the EU foreign-subsidies regime (FSR) on large deals with significant non-EU subsidies.

    Data and cybersecurity: GDPR, NIS2, IT

    Data and IT systems are a real exposure today. We review GDPR compliance (record of processing, data-processing agreements, lawful bases, transfers outside the EEA, the history of breaches and authority decisions), the state of IT security and software licences, and — for entities in scope — cybersecurity duties (NIS2 and the national cybersecurity system).

    Financing & tax

    Financing and security

    The target's assets are often encumbered, and its debt bristling with clauses the transaction triggers. We review mortgages, registered pledges, transfers for security and security assignments, sureties and guarantees, and in loan agreements the change-of-control and cross-default clauses (a change of owner as an event of default). Separately we examine financial assistance — a joint-stock company financing the acquisition of its own shares is permitted only if the conditions in art. 345 of the Commercial Companies Code are met, so we verify those conditions and the required documentation.

    Structural tax and KSeF exposure

    We review tax at the structural level (detailed tax due diligence is run by a tax adviser, usually in parallel). Structure has a direct effect: a share deal as a rule carries 1% transfer tax (PCC) on the value of the shares, while the sale of a business or an organised part of it is outside VAT (art. 6(1) of the VAT Act) but subject to PCC. We add the buyer's liability for specified tax arrears when acquiring an enterprise or an organised part of it (art. 112 of the Tax Ordinance) and a new item — whether the target has rolled out mandatory KSeF e-invoicing.

    For whom

    • Buyers and investors — you know what you are buying and at what price before you sign.
    • Sellers (vendor DD) — you review your own company before a sale, to keep control of the process and the price.
    • Private equity funds and strategic acquirers — a repeatable, workstream-by-workstream review for the investment decision.
    • Buyers of real estate and asset portfolios — legal title, encumbrances and environmental risk.
    • Lenders (banks, debt funds) — a report for the credit decision and the security package.

    Why WLAW

    We don't hand you a report and leave. We connect the red flags to price and contract — we show how much a given defect is worth in the negotiation and how to dress it into warranties, an indemnity or a condition precedent. Under one roof you have a transactions team, real-estate lawyers and disputes specialists, so every workstream is run by someone who does it day to day. And we fit the format to the stage and the budget: a fast red-flag for the "go or no-go" call, or a full report for the final valuation and the lender.

    How we work

    1

    Scope & materiality

    we agree what we examine and what matters for the decision and the price.

    2

    Data room & Q&A

    we review the VDR and run a question list to the seller.

    3

    Analysis

    we examine the target workstream by workstream and gather the red flags.

    4

    Report

    you get a red-flag or a full report, fitted to stage and budget.

    5

    Negotiation

    we turn the findings into price and into the wording of the SPA.

    Legal landscape

    We track the dated points for you — as at August 2026:

    • Foreign-investment screening has been run since 24 July 2025 by the minister responsible for the economy, not UOKiK.
    • A merger notification to UOKiK may be required where the deal is a concentration and thresholds are crossed: EUR 1 billion of worldwide turnover or EUR 50 million in Poland (absent a statutory exclusion).
    • The EU foreign-subsidies regime (FSR) is in force, and the Commission clarified it with Guidelines in early 2026.
    • Mandatory KSeF e-invoicing already applies in stages, so we examine the target's compliance as a real DD item, not a future risk.
    • ESG and value-chain due diligence (CSDDD) are narrowed after the Omnibus I package — an investor or contractual requirement, not a universal standard.
    • The window to demand the buy-out of commercial perpetual usufruct closed on 31 August 2024 — today it is a fact about the target.

    Legal position: August 2026.

    Frequently asked questions

    How long does legal due diligence take?

    We count it in weeks, not days — the exact time depends on the scale and structure of the target. A simple red-flag review of a small company can be ready in 1–2 weeks; full DD of a mid-sized company with real estate, disputes and extensive contracts usually takes several weeks.

    The pace depends largely on how quickly the seller makes documents available in the data room. We set the timetable at the outset together with the scope, so there are no surprises at the end.

    A red-flag report or a full report — which to choose?

    A red-flag for the fast go/no-go decision, a full report for the final valuation and contract negotiations — the stage of the deal decides which. A red-flag report is a fast filter — it shows only the material risks and potential deal-breakers, ideal in competitive transactions where time matters.

    A full report describes every area in detail — needed for valuation, for negotiating the representations and warranties, and for the lender. We often do it in two stages: a red-flag first, then depth where the red-flag flagged something.

    DD found a defect — do we go back to price or to warranties in the contract?

    To both — it is a negotiating decision, not an either/or. A defect can be settled by cutting the price, by shifting the risk to the seller through representations & warranties and an indemnity clause, by making closing conditional on the defect being cured (a condition precedent), or by insuring the deal (W&I).

    As a rule of thumb: a certain, quantifiable risk usually goes into the price, and a contingent risk into an indemnity or warranties. Which route to take follows from how hard the defect is and how the balance of power sits in the negotiation.

    How does a share deal differ from an asset deal for DD?

    In scope, and in what passes to the buyer. In a share deal you buy the company with its whole history — we examine it backwards (debts, disputes, tax, title to the shares). In an asset deal you buy selected components, but depending on what is acquired, succession mechanisms apply: the transfer of the workplace (art. 23¹ of the Labour Code), liability for the business's obligations (art. 554 of the Civil Code) and for specified tax arrears (art. 112 of the Tax Ordinance).

    An asset deal also carries the risk that key contracts cannot be transferred without the other party's consent (an assignment ban). That is why the structure of the transaction sets the entire plan of the review — it is exactly where we begin.

    Do you do vendor due diligence (a review on the seller's side)?

    Yes — vendor DD is a review you commission as the seller, before you put the company up for sale. It gives you control of the process: it lets you find and fix weak points early, and one report for all bidders speeds up the transaction and narrows the room to negotiate price.

    Vendor DD is particularly worthwhile in auction processes and in a sale to a financial investor. It also tidies up the data room, so the buyer gets an ordered picture rather than a chaos of documents.

    What does real-estate DD cover?

    Above all, legal title: the state of the land and mortgage register, the ownership–perpetual-usufruct distinction, and encumbrances. We check mortgages, easements, lease and tenancy, pre-emption rights, zoning under the local plan or a planning decision, and environmental matters (historic soil contamination).

    Separately — especially in Warsaw — we assess the risk of restitution claims to properties affected by post-war nationalisation decrees and the compliance of the buildings with permits. For a company that comes with real estate, we run this workstream in parallel with the corporate review.

    Does DD cover tax?

    At the structural level, yes; full tax due diligence is run by a tax adviser, usually in parallel. We point out the tax consequences of the chosen structure (a share deal — as a rule 1% PCC; a sale of a business or an organised part of it: outside VAT, but subject to PCC) and — when acquiring an enterprise or an organised part of it — the buyer's liability for specified tax arrears (art. 112 of the Tax Ordinance).

    From 2026 we add the target's exposure to mandatory KSeF to the review: whether it has rolled out e-invoicing and whether its processes are compliant. That is no longer a future risk but a real checkpoint.

    Does our transaction need UOKiK clearance or investment screening?

    We check this in every DD, because such a clearance can be a condition of closing — whether it applies depends on the turnover thresholds and the target's profile. A merger notification to the President of UOKiK may be required where the deal is a concentration and the thresholds are crossed: as a rule EUR 1 billion of worldwide turnover or EUR 50 million in Poland, absent a statutory exclusion.

    Separately, an acquisition of a strategic company by an investor from outside the EU, EEA or OECD may need clearance under investment screening — run since 24 July 2025 by the minister responsible for the economy, not UOKiK. Large deals involving non-EU subsidies may be notifiable to the Commission (FSR).

    What does working together look like — what is a data room?

    We work in a virtual data room (VDR) — a secured platform where the seller makes the target's documents available. We review them against the agreed scope and put questions in a structured Q&A list.

    You get the result in a red-flag or a full-report format. At the outset we set the scope, the materiality thresholds and the timetable, so you know from the start what you will get and when.

    How does transactional DD differ from a compliance audit or a legal health check?

    In its purpose and its audience. Transactional DD is done for a specific transaction, from the perspective of the buying, selling or financing party — what counts are the risks that affect the decision, the price and the contract.

    A preventive legal health check is commissioned by a company on itself, with no transaction, to order its risks calmly. A compliance audit, in turn, checks conformity with specific regimes (GDPR, AML, ESG) on an ongoing basis. These are three different tools.

    Does DD guarantee that the target has no hidden risks?

    No — and no honest DD promises that. DD is a picture of the risks at a given moment, based on the documents and information the seller makes available; it does not replace a forensic audit.

    That is why we translate the findings into contractual mechanisms that protect you against what DD could not detect: representations & warranties, indemnities and — increasingly — a W&I policy.

    Can you insure the deal (W&I) instead of negotiating warranties?

    Usually not entirely — W&I shifts the financial risk of a warranty breach to the insurer, but the warranty package and its scope still normally get negotiated. W&I insurance (of representations and warranties) lets the seller make a cleaner exit and gives you a real source of recovery for claims.

    W&I does not replace DD, though — the insurer requires a thorough review as a condition of cover and excludes known and disclosed risks (which go into an indemnity). So the review and the policy work together, not as substitutes.

    When in the process does DD begin, and how does it affect the timetable?

    Usually after the letter of intent (LOI) is signed and access to the data room is granted, before the final agreement. DD supplies the ammunition for the price and contract negotiation, so the sooner we agree the scope, the fewer surprises at the end.

    The timetable is affected most by regulatory clearances — merger control at UOKiK, investment screening, FSR — because they can stretch the road to closing. That is why we identify them as early as possible.

    Our experts

    The team that will run your transaction — from reviewing the target and red flags to price and contract wording.

    Michał Wołoszański

    Michał Wołoszański

    Founder & Managing Partner,
    INSEAD Global Executive MBA, Attorney-at-law

    Michał oversees the firm's key transactions — from deal structure and negotiation to risk and contracts.

    Contact MichałClick the card for the full profile ›
    Łukasz Kudela

    Łukasz Kudela

    Senior Associate, Attorney-at-law,
    Cryptocurrency Project Manager

    Łukasz combines company law, competition and AML compliance — reviewing structure, transaction clearances and the target's regulatory risks.

    Contact ŁukaszClick the card for the full profile ›
    Kinga Miller

    Kinga Miller

    Partner, Advocate,
    Approved Compliance Expert, Approved ESG Officer

    Kinga reviews the target's regulatory and litigation risks — those that really affect price and the contract.

    Contact KingaClick the card for the full profile ›
    Karolina Dębiec

    Karolina Dębiec

    Lawyer,
    Key Projects Coordinator

    Karolina runs the corporate review and company law — title to shares, ownership governance and the target's structure.

    Contact KarolinaClick the card for the full profile ›

    Let's talk about your transaction

    Tell us what you are buying, selling or financing and where you are — we'll flag the scope of the review and the next step.

    Contact us