Skip to main content

A Comprehensive Guide to Legal Due Diligence

By May 29, 2025June 5th, 2025News
A comprehensive guide to due diligence in Thailand H&P Herrera and Partners legal investigations in Thailand

Legal due diligence is a critical process in any business transaction, particularly in mergers and acquisitions (M&A). Conducting a thorough legal review minimizes risks, identifies potential liabilities, and ensures transparency in significant deals. Whether you’re a business owner, a legal professional, or an entrepreneur planning to set up a company in Thailand, understanding the nuances of legal due diligence can add unmatched value to your ventures.

This article will walk you through the essentials of legal due diligence, its applications in M&A, and the various types involved, while also shedding light on key legal requirements.

What Is Legal Due Diligence?

At its core, legal due diligence is the process of evaluating and investigating the legal framework and documents of a company to uncover risks, verify compliance, and assess the overall viability of transactions. The process ensures that all legal aspects of the business, ranging from corporate governance to intellectual property rights, are in order before any agreement is finalized.

The goal is to answer pivotal questions, including:  

  • Are there any existing or potential legal issues?
  • Is the company compliant with applicable laws and regulations?
  • How do various agreements, contracts, or intellectual property rights impact the deal?

This process equips both buyers and sellers with valuable insights to make informed decisions about the worth and risks of the transaction, particularly in M&A.

Legal Due Diligence in Mergers and Acquisitions

As mentioned earlier, legal due diligence plays a pivotal role in M&A transactions. For both the buy-side and sell-side, the process can make or break a business deal. 

Buy-Side Due Diligence

In the process of reviewing legal due diligence, the buyer or acquiring company aims to: 

  • Understand the target entity’s business operations.
  • Assess risks, liabilities, and legal compliance.
  • Determine a fair valuation.
  • Build a robust M&A contract by incorporating insights from the review.

For example, evaluating litigation history or existing contracts can highlight potential risks or benefits, strengthening the negotiated terms, especially when conducting business in a foreign country with unfamiliar law.

Sell-Side Due Diligence

For sellers, legal due diligence is equally critical. It helps:

  • Identify any gaps or issues in business processes or documentation.
  • Prepare the company for scrutiny by potential buyers or investors.
  • Resolve liabilities ahead of negotiations, increasing the chance of a higher valuation.

Sellers conducting their internal due diligence before entering the market often experience smoother transactions, reducing potential deal fallout.

Types of Legal Due Diligence

A Comprehensive Guide to Legal Due Diligence

Legal due diligence goes beyond a general business examination. It dives into specific areas of a company’s operations, ensuring all aspects contribute to an informed decision. 

Below are some key types of legal due diligence:

1. Corporate and Organizational Due Diligence

This form of due diligence assesses the target company’s legal structure, including articles of incorporation and bylaws, ownership and shareholder agreements, as well as board of directors’ meeting minutes.

2. Contractual Due Diligence

This particular type of due diligence involves a thorough review of various business contracts, from customer and vendor contracts and employment agreements to partnership, franchise, and licensing arrangements.

3. Litigation and Legal Compliance

With the assistance of a law firm in Bangkok, this type of due diligence includes reviewing pending or past lawsuits, examining environmental policies, regulatory compliance, and industry-specific obligations. The revision also extends to scrutinizing intellectual property rights. Unresolved legal disputes can lead to significant financial and reputational damage post-acquisition, which is why this form of legal due diligence is vital for avoiding legal pitfalls in M&A.

4. Financial and Tax Due Diligence

Revenue, expenses, and compliance with tax laws are evaluated to ensure the company’s finances are as reported, avoiding potential penalties or hidden liabilities.

5. Intellectual Property Due Diligence

Intellectual property (IP) is often one of the most valuable assets in modern businesses. Reviewing trademarks, copyrights, patents, and trade secrets ensures that ownership and protection are intact, avoiding disputes down the line.

6. Real Estate Due Diligence

In addition, we are equipped to perform comprehensive legal due diligence on real estate, including land and buildings. This is especially important for understanding the legal status of the land, current ownership, and any encumbrances tied to the property or its owner. Such due diligence is typically conducted prior to signing lease or purchase agreements involving real estate, land, and buildings.

Understanding the scope of legal due diligence above ensures comprehensive coverage, so no stone is left unturned during the review process.

Legal Requirement to Carry Out Client Due Diligence

Legal due diligence is not just an optional step in business transactions; often, it is a mandatory requirement to comply with the law. Especially in highly regulated industries, client due diligence, also known as customer due diligence (CDD), is essential for ensuring that all entities entering into a transaction are legally verified. 

Unlike normal due diligence, client due diligence refers to the identification and verification process that businesses undertake to confirm the authenticity of their clients. This is particularly important due to several reasons: 

  • To mitigate risks associated with money laundering, fraud, or corruption.
  • To ensure compliance with global Anti-Money Laundering (AML) and Counter-Terrorism Financing (CTF) regulations. 

Client Due Diligence Example

For example, when setting up a representative office in Thailand, local regulations often require thorough client due diligence to ensure compliance. Similarly, in the process of Thailand Company formation, conducting due diligence on potential partners or service providers can safeguard against regulatory complications.

Regulations often mandate that businesses collect and analyze government-issued identification documents, proof of business registration or legal operations, and details of ownership structures in international transactions. Failure to adhere to due diligence requirements can result in significant penalties, reputational harm, or regulatory scrutiny.

Creating a Legal Due Diligence Checklist

Having a detailed legal due diligence checklist is instrumental for ensuring that no critical aspect of the investigation is overlooked. While the specifics may vary across industries, here are the essentials every checklist should include:

  • Corporate Structure: Articles of incorporation, board records, shareholder agreements.
  • Contracts: Vendor agreements, customer contracts, and employment agreements.
  • Legal Proceedings: Lawsuits, investigations, regulatory disputes.
  • Financial Records: Tax filings, debt structures, and audit reports.
  • Compliance Certificates: Proof of adherence to industry and local regulations.
  • Intellectual Property: Registrations for patents, trademarks, and copyrights.

These elements provide a structured roadmap for the review process, ensuring transparency across all operational layers.

Why Legal Due Diligence is Essential

As noted above, legal due diligence is a crucial process that provides significant advantages to businesses and M&A deals. It enables companies to: 

  • Identify potential red flags and risks before committing.
  • Build trust between parties, facilitating smoother negotiations.
  • Secure fair valuations based on a thorough understanding of the target entity.
  • Ensure compliance with legal frameworks to avoid post-transaction disputes.

Legal due diligence isn’t just about uncovering risks; it is about creating clarity in what could otherwise be a cluttered, high-stakes transaction. By focusing on comprehensive reviews spanning contracts, compliance, litigation, and more, you ensure that every deal is not only secure but also optimized for value.

If you are planning to align with experienced professionals for streamlined legal reviews, partnering with a leading law firm in Thailand, such as Herrera & Partners, is an excellent first step. They can help you establish a representative office in Thailand or facilitate smooth cross-border operations.

Contact Herrera & Partners

For any queries or help with these services, contact us through the following channels:

Phone: +66 2254 5600

Email: [email protected] 

Office in Bangkok: 142 Two Pacific Place, 17th Floor, Unit 1705, Sukhumvit Road, Klongtoey, Bangkok 10110

Close Menu