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Due Diligence Review: Types, Process, Red Flags, Reports

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What is a Due Diligence Review and Why is it Important?

A due diligence review is the process of investigating and analyzing a contract, business opportunity, or company to ensure that they are aligned with your goals or values.

There are various reasons for conducting due diligence, such as if you want to confirm information that came up during a transaction or to identify red flags in an investment opportunity.

In companies, a due diligence review helps one company to verify another business entity, and it’s common before mergers. The company itself can conduct a due diligence review, or it can hire an external specialized firm to conduct it.

Read the rest of this article to explore due diligence reviews in greater detail, how they work, and when you should consult with a qualified lawyer for help with the process.

What are the Types of Due Diligence Reviews?

Due diligence reviews can be conducted in various areas of the company. Here’s a rundown of the most common due diligence reviews and what they entail.

  • Financial Due Diligence. This is a deep review of a company’s financial situation, such as their earnings, capital, accounting policies, and tax exposures. It provides a clearer picture of the company’s financial health.
  • Commercial Due Diligence. This assesses the company’s market structure, pricing, growth, and competitive advantages. It can also help investors confirm the company’s revenue streams.
  • Client or Customer Due Diligence. This involves identifying and verifying the customer, by reviewing things like payment history and duties. In some cases, it can involve Know Your Customer (KYC) checks.
  • Vendor Due Diligence. This can help to speed up a deal by reviewing the company’s working relationship with vendors, ensuring the vendor is reputable and legally compliant.
  • ESG and Sustainability Due Diligence. This review focuses on issues such as human rights and environmental concerns on the value chain.
  • Sanctions Due Diligence. In terms of trade, this type of due diligence review checks that the company isn’t working with prohibited entities to guarantee their compliance with regulations.
  • Digital due diligence. This includes IP (Intellectual Property), license, and digital asset reviews. It maintains secure and compliant systems.

What’s Involved in the Due Diligence Review Process?

Although the process of conducting a due diligence review can vary depending on its type, there are some general steps that are usually involved.

Goal Setting

Before conducting a due diligence review, you should understand exactly what you want to test or what information you’d like to verify. Consider why it’s important and how your decision will be affected by what you learn during the process.

Gathering Information

A due diligence review usually begins with collecting information and documents related to the reason for the review. These can provide greater clarity, such as regarding a company’s operations, so that the other party makes a well-informed decision.

Common types of documents included in this phase of the review include the following:

  • Taxation documents
  • Financial budgets
  • Balance sheets
  • Partnership contracts
  • Data protection policies

Discussions with the Other Party

Once both parties have reviewed all the important documents related to their concern, they should have a discussion to answer each other’s questions and provide transparency. This can take some time in the case of complex company transactions or mergers.

Expert Consultations

In some cases, such as those that involve complex transactions, you could reach out to experts for their input, such as lawyers, accountants, or tech experts. This can provide fresh insights into the due diligence review process.

Conducting Relevant Research

Tasks that usually form part of a due diligence review will vary depending on what aspect of the business is being investigated.

For example, if a company is considering working with a cybersecurity vendor, during a due diligence review they might analyze the vendor’s certifications, check their incident response systems, and review their data breach policies.

What Happens After a Due Diligence Review Process?

Once the due diligence process is completed, there are some important steps.

Whether or not the transaction or deal was agreed on by both parties, all documents related to it need to be stored. This creates a due diligence record, but it needs to comply with all legal requirements.

You should also create a due diligence report. In cases where one business is reviewing another business to assess if a working relationship is worth pursuing, the report will be given to the board who will make a final decision on the matter.

What’s Included in a Due Diligence Report?

A due diligence report needs to be written in a concise and clear manner. It should include information about the transaction or deal, such as pricing and risks. It must explain the findings of the review and specify improvements that can be made.

What are Due Diligence Review Red Flags?

Some common red flags that can occur during a due diligence review process of a company include the following:

  • Missing documents. If you can’t acquire important financial or other documents, the company might lack transparency. This should require further research.
  • Vague legal structures. A company with a complex or unclear business structure could be hiding liabilities or have other issues.
  • High employee turnover. This can signal issues with the company and its reputation. It might have many negative online employee reviews or problematic HR policies.
  • Legal issues. Should a company be involved in active litigation or have a long history of being sued, this might make you want to tread carefully as you could be putting yourself at risk by working with them.

Do You Need to Hire a Lawyer for a Due Diligence Review?

It’s essential to hire a lawyer when conducting a due diligence review. They will bring expertise you need to spot legal, contractual, regulatory, and other risks.

A lawyer will:

  • Check all contracts and other documents for clarity and cohesiveness.
  • Check that all compliance obligations are being fulfilled. This can also uncover issues such as a long litigation history.
  • Guide the requesting party on reducing their risks before they sign a contract with the company being reviewed.
  • Drafting or reviewing your due diligence report so that it’s clear, professional, and useful.

If you want to hire a lawyer for assistance with the due diligence review process, you can hire one on ContractsCounsel, an online legal marketplace where clients can connect with vetted, experienced lawyers.

You can search for the best lawyer for your needs according to factors such as their location, expertise, and client ratings. All the research is provided on the platform to speed up the process of hiring a lawyer.


ContractsCounsel is not a law firm, and this post should not be considered and does not contain legal advice. To ensure the information and advice in this post are correct, sufficient, and appropriate for your situation, please consult a licensed attorney. Also, using or accessing ContractsCounsel's site does not create an attorney-client relationship between you and ContractsCounsel.


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