The content of this guide focuses on explaining the underlying rationale and framework of due diligence activities, as well as the way in which different due diligence workstreams interact throughout an M&A transaction, and a checklist for the fundamental legal categories and critical scrutiny points required for a comprehensive legal due diligence.
The items listed in this guide are general in nature and not exhaustive. Additional considerations and critical items may apply depending on the transaction structure, the target company, and its sector of activity. Sell-side and buy-side parties are advised to engage relevant stakeholders, including financial, tax, technical, and legal advisors, throughout the process.
This guide is intended as a practical reference and does not constitute legal, financial, or investment advice.
DUE DILIGENCE RATIONALE AND ITS FRAMEWORK
Due diligence plays a central role in M&A transactions by uncovering the factual and legal reality of the target company or asset beyond headline figures and strategic narratives. It allows transaction parties, particularly the buy-side, to assess whether the contemplated transaction is viable, how identified risks should be addressed, and how value should ultimately be reflected in the transaction structure and documentation. This section focuses on the rationale of due diligence and outlines the framework through which due diligence activities are commonly structured and applied.
What is Due Diligence in an M&A Context?
Purpose and Objectives of Due Diligence
Due diligence is a structured review process aimed at identifying risks, validating value drivers, and understanding the target company’s legal, financial, operational, and regulatory position. Rather than merely confirming compliance, due diligence serves to inform transaction structure, pricing mechanisms, risk allocation, and post-closing integration planning. A well-executed due diligence process enables parties to make informed decisions based on verified information rather than assumptions.
Buy-Side vs Sell-Side Due Diligence
Buy-side due diligence is conducted to assess risks, liabilities, and opportunities associated with the acquisition and to determine whether and on what terms the transaction should proceed. Sell-side due diligence or vendor due diligence, by contrast, is typically undertaken to identify and address potential issues in advance, enhance transparency, and maintain control over the disclosure narrative. While their objectives differ, both approaches seek to reduce uncertainty, streamline negotiations, and minimize disruptive findings at later stages of the transaction. Sell-side due diligence is usually completed to share with potential buyers before non-binding phase which is the widely accepted market practice.
Red Flag Due Diligence vs Full-Scope Due Diligence
Red flag due diligence focuses on identifying material issues that may impact deal feasibility, valuation, or timing, often under tight timelines and limited scope. Full-scope due diligence, on the other hand, involves a comprehensive review across all relevant workstreams and is usually conducted once exclusivity is granted. The choice between these approaches depends on transaction dynamics, competitive pressure, and the parties’ risk tolerance, and may evolve as the transaction progresses.
Core Due Diligence Stream
Due diligence in an M&A transaction is typically conducted through multiple parallel workstreams, each focusing on a specific risk and value dimension of the target company. While each workstream has its own scope and methodology, their findings are closely interconnected and collectively shape valuation, deal structure, and risk allocation. A fragmented or siloed approach may result in missed issues or misaligned conclusions; therefore, coordination among workstreams is essential.
Legal Due Diligence
Legal due diligence evaluates the legal framework within which the target operates, including corporate structure, material contracts, regulatory compliance, litigation exposure, employment matters, and asset ownership. It serves as a foundational workstream that connects and contextualizes findings from other disciplines, ensuring that identified financial, tax, or operational issues can be legally enforced, mitigated, or allocated through transaction documentation.
Financial Due Diligence
Financial due diligence focuses on the sustainability and quality of the target’s financial performance. It examines historical financials, earnings quality, working capital dynamics, net debt, cash flow generation, and normalization adjustments. The findings of financial due diligence directly influence valuation, price mechanisms, and completion accounts, while also providing a reference point for assessing assumptions reflected in the business plan and projections.
Tax Due Diligence
Tax due diligence aims to identify historical and potential tax exposures, compliance risks, and structural inefficiencies within the target company. It assesses corporate income taxes, indirect taxes, transfer pricing, group structuring, and available tax attributes. Tax findings often inform indemnity structures, escrow arrangements, and post-closing restructuring considerations, and are closely linked with both financial and legal due diligence outcomes.
Operational and Commercial Due Diligence
Operational and commercial due diligence assesses the target’s business model, operational resilience, customer and supplier relationships, market positioning, and competitive dynamics. It focuses on the sustainability of revenues and the practicality of growth assumptions. Findings from this workstream often trigger deeper legal and financial analysis, particularly in relation to key contracts, customer concentration, and dependency risks.
Insurance Due Diligence
Insurance due diligence focuses on assessing the adequacy, scope, and effectiveness of the target company’s insurance coverage in relation to its business activities, assets, and risk profile. It typically reviews existing insurance policies, coverage limits, exclusions, deductibles, claims history, and policy continuity. Findings from this workstream are closely linked to legal and HSE due diligence and may directly influence indemnity structures, representations and warranties, and the availability or structuring of warranty & indemnity (W&I) insurance.
Environmental, Health & Safety (HSE) and Regulatory Due Diligence
HSE and regulatory due diligence addresses environmental liabilities, occupational health and safety compliance, permits, licenses, and sector-specific regulatory obligations. These risks may be long-term, contingent, or off-balance sheet in nature and can have a material impact on valuation and post-closing exposure. Close coordination with legal due diligence is essential to determine appropriate risk mitigation tools, including indemnities, conditions precedent, insurance solutions, or remediation obligations.
How Due Diligence Findings Shape Transaction Documents
Due diligence findings do not exist in isolation; their ultimate purpose is to inform how risks and value are reflected in the transaction documentation. In an M&A context, the Share Purchase Agreement (SPA), Asset Purchase Agreement (APA), Investment Agreement (IA) and/or the Shareholders’ Agreement (SHA) serve as the instruments through which identified risks are allocated between the parties, and through which commercial assumptions are translated into binding legal commitments.
At its core, due diligence is a mechanism for identifying material issues and determining whether such risks should be accepted, mitigated, priced in, or contractually allocated. Findings that emerge during due diligence directly influence the structure and content of the transaction documents, shaping the economic terms of the transaction as well as the scope of post-closing protections.
From a pricing perspective, financial and tax due diligence findings often affect the purchase price mechanics. Issues relating to earnings quality, working capital normalization, net debt definition, or contingent tax exposures may result in price adjustments, earn-out structures, or specific economic protections. In some cases, material findings may lead to a redefinition of the valuation methodology or a reassessment of the headline price.
Legal due diligence findings play a central role in defining the scope of representations and warranties. The nature, extent, and materiality thresholds of such warranties are often tailored in light of identified risks. Known issues are typically excluded from general warranty coverage or addressed through specific contractual mechanisms, while unknown risks are allocated through general representations, subject to negotiated limitations.
Where due diligence reveals specific, identifiable risks that cannot be adequately addressed through general warranties alone, parties may agree on bespoke indemnities. These indemnities are commonly accompanied by negotiated caps, baskets, and survival periods, and may be supported by escrow arrangements or deferred payment mechanisms. The decision as to whether a risk is addressed through indemnification, price adjustment, or insurance is often driven by the severity, probability, and measurability of the exposure identified during due diligence.
Due diligence findings may also give rise to conditions precedent or pre-closing obligations. Regulatory approvals, third-party consents, remediation actions, or internal corporate approvals identified during due diligence are frequently reflected as conditions to closing or as obligations to be satisfied prior to completion. Failure to properly capture such matters in the transaction documents may lead to execution risk or post-closing disputes.
In transactions involving ongoing co-shareholding, due diligence findings may further influence the governance and protection mechanisms set out in the SHA. Matters such as reserved matters, veto rights, information rights, exit provisions, and deadlock mechanisms are often shaped by risks and dependencies identified during the review of the target’s operations, contracts, or regulatory environment.
Insurance considerations also intersect with the treatment of due diligence findings. The availability and scope of warranty and indemnity (W&I) insurance, as well as the adequacy of the target’s existing operational insurance coverage, are closely linked to the quality and depth of the due diligence process. Certain risks may be transferable to insurers, while others, particularly known or structural issues, remain the responsibility of the transaction parties and must be addressed contractually.
Ultimately, the effectiveness of an M&A transaction depends not only on the identification of risks during due diligence, but on the disciplined translation of those findings into clear, enforceable, and commercially balanced transaction documents. A well-integrated due diligence process ensures that the SPA and SHA accurately reflect the agreed allocation of risk, align with the parties’ commercial understanding, and reduce the likelihood of disputes following closing.
LEGAL DUE DILIGENCE IN DETAILS
Following the acceptance letter phase, the Legal Due Diligence process represents the most data-intensive phase of M&A transactions. The primary objective of this stage is to verify the legal ‘Good Standing’ of the target company, identify potential risks (‘Red Flags’), and determine the impact of these risks on the transaction value or deal structure (e.g., Representations and Warranties, Specific Indemnities, De Minimis and Basket Amounts). The checklist below outlines the fundamental legal categories and critical scrutiny points required for a comprehensive investigation.
Corporate Structure & Shareholding
✓ Verify the unbroken chain of title to shares. Ensure the Share Ledger is up-to-date and matches the Trade Registry records. Check for any pledges or encumbrances on shares.
✓ Review for any transfer restrictions, privileged shares (Golden Shares), or specific majority requirements for board/shareholder resolutions.
✓ Check the persons who are entitled to represent and bind the target company either as a board member or via the internal directive on signature powers or a power of attorney. Ensure that major contracts signed in the past were executed by authorized representatives within their monetary limits.
✓ Verify that all subscribed capital has been fully paid-in including capital increases. Request bank receipts or auditor reports proving the payment.
✓ Review the minutes of General Assembly and Board of Directors meetings for the last 5 years. Check if meeting quorums were met and if Ministry Representatives were present where required.
✓ Check if the board issued share certificates and distributed them to the shareholders.
Material Contracts
✓ Identify contracts that grant the counterparty the right to terminate solely due to a change in the target company’s shareholding structure, or that explicitly require the counterparty’s written consent prior to any change in shareholding.
✓ Analyze termination notice periods and limitation of liability clauses in key customer and supplier agreements.
✓ Distinguish between “liquidated damages” (compensation for actual loss) and “penalty clauses” (punitive). Are the penalty amounts exorbitant enough to threaten company solvency?
✓ Check for broad indemnity clauses where the Target agrees to “hold harmless” the counterparty for any claims, including third-party lawsuits.
✓ Check for clauses that restrict the Target from doing business with specific customers or in certain territories, which might limit the Buyer’s post-acquisition strategy.
✓ Identify most favored customer clauses requiring the Target to offer the best price to a specific client. This can severely impact future pricing strategies and margins.
✓ Determine if contracts can be assigned to affiliates without consent. This is crucial for future restructuring or mergers.
✓ Specifically review the lease for the HQ or main factory. Does a “Change of Control” trigger an eviction right or rent increase?
✓ If the Target works with the government, check if the share transfer requires prior approval from the tender authority to avoid bans.
✓ Identify clauses where the Target acts as a guarantor for a third party (e.g., a parent company). Under Turkish Code of Obligations, specific form requirements apply for validity.
✓ Review performance bond conditions in construction or supply contracts. Under what specific conditions can the counterparty call the bond?
✓ Inventory all Letters of Guarantee given to third parties for the contracts signed by the target. Are they “payable on first demand”? Check if the letter of guarantee amount is capped or unlimited.
Financing Agreements
✓ Scrutinize loan agreements for “Change of Control” clauses that allow lenders to accelerate the debt (demand immediate repayment) upon share transfer.
✓ Check for restrictions on distributing dividends, taking on new debt, or disposing of assets without the lender’s consent.
✓ Identify cross-default clauses where a default in one agreement triggers a default in other financing arrangements.
✓ Identify any guarantees, indemnities, or suretyships (Kefalet) given by the Target to third parties (e.g., for a sister company’s loan). This is off-balance-sheet risk.
✓ Review any currency swaps or derivative contracts. These can carry massive hidden liabilities depending on market fluctuations.
Employment & HR
✓ Review the template employment agreements (e.g. change of control clauses, remuneration clauses)
✓ Review employment contracts of key management personnel. Check for non-compete clauses and “Golden Parachute” severance packages.
✓ Assess the risk of re-instatement lawsuits involving former employees and verify the sufficiency of severance provisions.
✓ Scrutinize agreements with subcontractors. Is there a risk of “collusive relationship” (Muvazaa)? If established, the Target could be liable for all subcontractor employee claims.
✓ Audit the actual overtime hours vs. payroll records. Missing annual leave signatures or unpaid overtime are the most common causes of lawsuits in Türkiye.
✓ Ensure employment contracts for R&D staff explicitly assign all IP rights (code, designs, inventions) to the company to the fullest extent permitted by law.
Regulatory & Compliance
✓ Confirm that all necessary operational licenses and permits are valid and transferable.
✓ Check if the target, its shareholders, or key clients appear on international sanction lists (OFAC, EU, UN) or are Politically Exposed Persons (PEPs).
✓ Verify if the company has adequate “Know Your Customer” (KYC) procedures and suspicious transaction reporting mechanisms in line with local AML laws.
✓ Scrutinize payments to consultants or agents in high-risk jurisdictions. Is there proof of service, or are these potential bribe channels?
✓ Review past internal audit findings. Have identified compliance breaches been remediated, or are they systemic issues?
✓ Audit compliance with Data Protection Laws.
✓ For industrial targets, verify “Environmental Impact Assessment Positive” or ” Environmental Impact Assessment Not Required” decisions. Check for compliance with waste management regulations.
✓ Review occupational health & safety board meeting minutes and risk assessment reports. Have there been any work accidents resulting in death or disability?
Competition Law Compliance
✓ Review any past or ongoing investigations by the Competition Authority. Check for risky practices like price-fixing or market allocation.
✓ Assess risks related to “Gun-Jumping” (implementing the merger before official approval), especially regarding pre-closing information exchange.
✓ Audit distribution agreements for Resale Price Maintenance (RPM). Dictating shelf prices to dealers is a major violation in Türkiye.
✓ In B2B contracts, ensure non-solicitation clauses are reasonable in duration (usually max 2 years) to avoid being deemed anti-competitive.
Litigation & Disputes
✓ List all pending lawsuits (as plaintiff or defendant) and any threatened litigation. Estimate the potential financial exposure.
✓ Query records for fines from authorities like Tax Office, Social Security Institution, Customs, or municipalities that may not yet be reflected in the financial statements.
✓ Compare the legal counsel’s risk assessment letters with the provisions set aside in the balance sheet. Is the “probable” risk understated?
Intellectual Property
✓ Distinguish between IP owned by the company and IP licensed from third parties. Ensure core software codes or brands are registered under the target’s name, not the founders’, or licensed via valid license agreements.
✓ Verify that domain names and social media handles are registered to the corporate entity, not the personal email addresses of the IT manager or founders.
✓ Check if the target actively monitors market for IP infringements and if there are any cease-and-desist letters sent or received.
Assets
✓ Verify title deeds for real estate. Crucially, check zoning status to ensure buildings comply with construction permits and have occupancy permits.
✓ Verify if major machinery is owned or leased via “Financial Leasing”. If leased, ownership remains with the Lessor until the final installment. Check the “Financial Leasing Registry”.
✓ Review vehicle registration documents (Ruhsat). Conduct an e-Government (E-Devlet) inquiry to check for unpaid traffic fines, tax debts, or judicial liens/seizures on the fleet.
✓ Conduct searches for mortgages, liens, or usufruct rights on key assets (real estate, machinery, vehicles).
✓ Commercial Enterprise Pledge Registry” (TARES). A pledge here burdens all movable assets (machinery, IP, stock) at once.
✓ Review insurance policies. Are the coverage limits adequate for replacement costs? Is “Business Interruption” included?
✓ Check if the inventory and machinery are insured against fire, theft, and flood at their replacement value, not just book value.
✓ Check purchase agreements for “Retention of Title” clauses. Suppliers might legally own the raw materials or machines sitting in the factory until full payment is made.
✓ Distinguish between company-owned inventory and “consignment” stock belonging to third parties. Misidentifying this inflates the asset valuation falsely.
