Mergers and Acquisitions (M&A) constitute strategically significant transactions in modern economic systems. At the same time, they are legally complex transactions that affect a wide range of stakeholders. One of the most important legal mechanisms for managing risks arising from such transactions is Legal Due Diligence.
This article examines the concept, principles, and role of legal due diligence as a fundamental element of M&A transactions. It further analyzes the differences in legal due diligence in the contexts of acquisition, merger/amalgamation, and takeover, and evaluates the impact of legal due diligence on contractual structuring and risk allocation within the framework of Thai law.
In the contemporary business environment, mergers and acquisitions have become an important mechanism for business expansion, enhancing competitiveness, and corporate restructuring. Nevertheless, a significant number of failed M&A transactions do not arise from strategic miscalculations but rather from insufficient assessment of legal risks.
In this context, legal due diligence plays a crucial role as a process through which legal risks are identified, analyzed, and systematically managed. This article proposes that legal due diligence should not merely be viewed as one procedural step within an M&A transaction but rather as a fundamental principle that determines the structure, integrity, and sustainability of the transaction.
Concept and Meaning of Legal Due Diligence
Legal Due Diligence refers to the process of investigating and evaluating the legal status of a target company prior to entering into a transaction that results in a change in ownership structure or control.
This process is grounded in the legal principles of legal certainty and freedom of contract.
From a functional perspective, legal due diligence serves three primary purposes:
- To verify the legal status of the target business
- To identify and assess legal risks that may give rise to contingent or historical liabilities
- To support structural decision-making and the determination of contractual terms in M&A transactions
Legal Due Diligence in Different Forms of M&A
Acquisition
An acquisition is a form of M&A in which the target company continues to exist as the same legal entity, while the purchaser acquires all or part of its shares or assets.
Such transactions are based on the principle of property rights under Section 1336 of the Thai Civil and Commercial Code.
In the case of share acquisition, the purchaser effectively assumes all legal risks associated with the target company, including liabilities, contractual obligations, and disputes that may have arisen prior to the transaction.
Consequently, legal due diligence in share acquisition primarily focuses on identifying hidden liabilities, which may not appear in the company’s financial statements.
Merger / Amalgamation
Under Sections 1238–1243 of the Thai Civil and Commercial Code, a merger or amalgamation occurs when two or more companies combine into a single company. The original companies cease to exist as juristic persons, and the newly formed company automatically acquires all assets, rights, obligations, and liabilities of the former companies by operation of law.
Due to this automatic transfer of rights and liabilities, legal due diligence in merger transactions is particularly critical. Legal risks of one merging company may directly affect the newly formed entity.
Therefore, stakeholders such as creditors, employees, and contractual counterparties must be carefully considered during the due diligence process.
Takeover
A takeover refers to the acquisition of shares at a level that confers significant control over a company, particularly in the context of publicly listed companies.
In Thailand, takeover transactions are regulated under the Securities and Exchange Act B.E. 2535 (1992), which requires a mandatory tender offer when an acquirer reaches certain statutory shareholding thresholds.
Accordingly, legal due diligence in takeover transactions encompasses not only the legal status of the target company but also compliance with capital market regulations, aimed at protecting minority shareholders and maintaining fairness in the securities market.
Scope of Legal Due Diligence
The scope of legal due diligence generally includes the examination of:
- Corporate structure and shareholding
- Material business contracts
- Assets and intellectual property rights
- Disputes and litigation
- Regulatory compliance, including laws relating to labor, taxation, and environmental regulations
The scope of review must be tailored to the nature of the transaction and the level of risk acceptable to the contracting parties.
Impact of Legal Due Diligence on M&A Contract Structure
Findings from legal due diligence are directly applied in structuring M&A agreements, including:
- Representations and Warranties
- Indemnities
- Conditions Precedent
- Purchase Price Adjustment Mechanisms
These contractual mechanisms reflect the role of legal due diligence in allocating risks fairly between the contracting parties.
Joint Venture (JV) and the Role of Legal Due Diligence
A Joint Venture (JV) represents a form of business collaboration distinct from acquisitions or mergers. In a JV, the parties do not intend for one party to assume control over the other, nor for existing companies to cease to exist. Instead, the parties establish a new legal entity to carry out a specific business or project, while each party remains independent in its other business operations.
From a legal perspective, the establishment of a JV is governed by contract law and company law, particularly the provisions of the Thai Civil and Commercial Code relating to private limited companies.
(1) Legal Characteristics of Joint Ventures
A defining feature of a JV is the sharing of management authority and risks between the partners.
In many cases, JV structures involve shareholding arrangements where no party holds more than 50 percent of the shares, or where both parties hold equal shares (50:50), reflecting a strategic partnership.
As a result, JVs present unique legal risks, particularly in relation to:
- Shareholder conflicts
- Management deadlock
- Voting rights in key corporate decisions
(2) Necessity of Legal Due Diligence in JV Formation
Although a JV involves the creation of a new legal entity, legal due diligence remains highly important because the risks of a JV extend beyond the newly established company.
Legal due diligence in JV transactions typically operates on two levels:
- Due diligence on the legal status of the businesses or assets contributed by each JV partner
- Due diligence on the legality of the JV structure itself
Examples include verifying intellectual property rights contributed to the JV, reviewing contractual restrictions affecting the partners, and examining regulatory limitations under specific laws such as the Foreign Business Act.
(3) Scope of Legal Due Diligence in JV Transactions
Legal due diligence in JV transactions typically focuses on:
(1) Legal status of the JV partners
- Corporate structure
- Authority of the board of directors to enter into the JV
- Restrictions under articles of association or existing agreements
(2) Assets or rights contributed to the JV
- Intellectual property
- Technology
- Business licenses
(3) Governance and voting structure
- Reserved Matters
- Veto rights
- Deadlock resolution mechanisms
(4) Exit mechanisms
- Call/Put options
- Drag-along / Tag-along rights
- Dissolution or third-party share sale
(4) Impact of Legal Due Diligence on JV Agreements
Findings from legal due diligence are directly incorporated into the drafting of:
- Shareholders’ Agreements (SHA)
- Joint Venture Agreements (JVA)
Particularly in relation to representations and warranties, conditions precedent, and dispute resolution mechanisms, which are essential in preventing conflicts between JV partners in the long term.
Legal due diligence in JV arrangements therefore serves not only to uncover past risks but also to design the legal relationship between partners from the outset.
Academic Observation on Joint Ventures
When compared with acquisitions, mergers, and takeovers, joint ventures emphasize collaboration rather than control.
Consequently, legal due diligence in JV transactions tends to have a preventive character, focusing on avoiding future disputes rather than merely addressing historical liabilities.
Conclusion
Legal Due Diligence constitutes a fundamental element of mergers and acquisitions under Thai law, as it serves as a critical mechanism for examining and evaluating the legal status of the target business prior to transactions that result in changes in ownership or control.
Emphasizing legal due diligence at the early stages of a transaction not only reduces potential legal risks and contingent liabilities but also promotes legal certainty, transactional transparency, and long-term sustainability in M&A transactions.
In the context of Joint Ventures (JV), although there is no transfer of an existing business or dissolution of existing legal entities as in mergers, legal due diligence remains essential because the risks of a JV extend beyond the newly established entity. These risks include the legal status, rights, and restrictions of each partner, as well as the legality of the assets, rights, or technologies contributed to the JV.
Accordingly, incorporating the findings of legal due diligence into the structuring of joint ventures, including governance arrangements, voting rights, and dispute resolution mechanisms, is essential in preventing conflicts between partners and ensuring the stability of the legal relationship in the long term.
Ultimately, legal due diligence should not be regarded merely as a technical procedure but rather as a foundational element for the success and sustainability of M&A and joint venture transactions under Thai law.
