Due Diligence Questionnaire: What It Asks, and What It Can't Tell You

What a Due Diligence Questionnaire Is

A due diligence questionnaire is the written half of an investigation. The party doing the diligence sets out what it needs to know, in a fixed order, and the other side answers in writing, attaching the documents that support each answer. Questions and answers then sit in one place, where everyone on the deal can see what has been asked, what has been answered and what is still open.

The term names three different documents, and search results mix them freely:

• Fund questionnaires. Investors in private funds send them to the managers they are considering. Industry bodies publish standard versions so a manager can answer the most frequent questions once: the Institutional Limited Partners Association maintains one for private equity, and the Alternative Investment Management Association publishes a set for alternative investment funds and their managers. In private markets, "the DDQ" usually means one of these.
• Deal questionnaires. A buyer or investor sends one to a company it may acquire or back. It runs alongside the document request list and the management meetings, and it is the subject of this page.
• Vendor questionnaires. Businesses, and banks in particular, send them to suppliers before relying on them. Bank supervisors treat this as part of third-party risk management and expect the depth of the diligence to match the risk the supplier carries.

The three share a shape, and they share a limit. Each collects what the respondent is prepared to state. None of them, on its own, establishes that the statements are true.

Questionnaire or Request List

In deal work the two travel together, and the names blur. A request list asks for documents: the contracts, the monthly accounts, the organization chart. A questionnaire asks for statements: how revenue is recognized, which customers can leave on notice, who can sign for the company. Most deal questionnaires are hybrids, each question paired with the documents that support its answer.

The difference matters for what comes back. A document shows what exists. An answer shows what management is prepared to say. Both are evidence, and neither is the record of how the company actually ran.

What a Buyer's Questionnaire Covers

The sections follow the workstreams, and each one settles a different question about the same company. The types of due diligence map shows how the workstreams divide the work.

• Corporate and ownership. Who owns what, who can bind the company, and which agreements change when ownership does.
• Financial. Whether the accounts reflect the business: the monthly results and the ledger behind them, revenue recognition, working capital and anything that behaves like debt. The accountants go further in financial due diligence and the quality of earnings review.
• Customers and revenue. Who the customers are, what they have signed, and how durable the revenue is. Questions about the market itself belong to commercial due diligence.
• Operations. How work moves from order to delivery, where it waits, and which suppliers the business cannot run without. See operational due diligence.
• Technology and data. Which systems run the business, who owns the code, how often it ships and what went wrong last time. The technology due diligence checklist goes line by line.
• People and organization. The organization chart, the leadership team, compensation, attrition and the names the company leans on. See human capital due diligence and key person risk.
• Legal, regulatory and tax. Litigation, licenses, compliance and tax positions. Counsel and the tax advisers own these answers and the judgment on them.
• Insurance and risk. What is insured and at what limits, what has been claimed, and what management itself worries about.

Where the Questionnaire Sits in a Deal

A short screening set sometimes goes out before a letter of intent, to surface anything that would stop the deal early. The full questionnaire usually follows exclusivity, when confirmatory diligence begins. It is answered through the data room, section by section, by the people who own each area.

Two constraints shape the order. The first is competition law. Where buyer and seller compete, pricing, cost and strategy information should be exchanged only behind safeguards such as clean teams and outside consultants, so those questions wait until the safeguards are agreed. The second is effort. Every question costs the company time while it still has a business to run, and a questionnaire that asks everything tends to get thin answers to the questions that matter.

Then there is where the answers end up. In a private acquisition, what the buyer can rely on is usually what the purchase agreement says: the representations and warranties, and the disclosure schedules that list the exceptions to them. Many agreements add a non-reliance clause, in which the buyer states that it relied only on the representations in the agreement. An answer the price depends on therefore has to find its way into the agreement. Deal counsel decides how.

What a Questionnaire Structurally Cannot Tell You

A questionnaire records what a company says about itself. That is attestation: useful, often accurate, and still an account prepared by the people with the most at stake in the outcome. Its limits are structural rather than a failure of effort, and they hold however carefully the questions are written.

• It answers only what was asked. A questionnaire is bounded by the sender's imagination, and the risk nobody thought to ask about stays invisible. FINRA makes the point to broker-dealers directly: mechanical reliance on a single checklist may result in an inadequate investigation.
• It is a snapshot. An answer describes one moment. The drift that matters, a month-end close that takes a little longer each quarter or a leadership calendar that fills week by week, shows only in records kept over time.
• It describes policy, not practice. Ask whether there is a documented release process and the answer is yes, with the document attached. Whether anyone follows it shows in the deployment history, not in the answer.
• It is drafted, and often reviewed by counsel. Answers are precise and narrow by design. An answer can be true in every word and still leave the real question open.
• It cannot see behavior. Who actually makes decisions, which teams have stopped working together, and which system or customer depends on one person: these live in how the company's systems are used, not in what anyone writes down.

None of this makes the questionnaire less necessary. It makes it one instrument among several. One of the bodies that publishes a standard form says as much: the questionnaire is an early step in diligence, not the last one, and its answers are there to be cross-checked against other sources. The questionnaire establishes what the company states. The records establish what happened. The interviews establish what management makes of the difference.

How to Test the Answers

Decide how each answer will be tested before the questionnaire goes out. There are three tests, and the questionnaire on this page tags every row with the one that applies:

• Document. A contract, policy, filing or statement the company provides. It proves the thing exists and says what it says.
• Record. An entry in a system of record: the ledger, the CRM, the code repository, the ticketing system, payroll. Records were written as the company ran, before anyone knew there would be a deal, which makes them hard to curate after the fact.
• Interview. Judgment, intent and context, which exist only in people's heads. Interview time goes furthest when it is spent on what the records raised.

Then work the answers:

• Tie every number to its source. A revenue answer goes to the ledger and the bank, a headcount answer to payroll.
• Ask for the date. Whether an incident response plan exists matters less than when it was last used, and what changed afterwards.
• Read a yes as a request for evidence. A yes with nothing attached is a claim waiting to be checked.
• Compare answers across sections. The same fact answered twice should agree. The largest customers named in one section and the revenue concentration shown in another describe one business.
• Follow every red flag. An answer that surprises opens an inquiry. It does not close one.
• Track every question to closure. Open, answered, verified, or carried into the agreement. A question that was answered but never tested is still open.

The operational due diligence checklist applies the same discipline to the operating questions alone.

If You Are the One Answering

On the other side of the table, a questionnaire is a long, repetitive job that arrives while the business still has to run. A few habits make it lighter and the answers stronger:

• Name one owner per section. Finance answers finance. One coordinator keeps the tracker and the deadlines.
• Answer the question asked. State the period and the unit, and file the supporting document in the data room under the same reference.
• Keep answers consistent. The same fact should read the same way in every section and every document.
• Say what you cannot answer. A gap stated plainly, with the reason, costs less than one found later.
• Bring counsel in early. Answers can end up in the purchase agreement and its disclosure schedules.

Templates Are a Starting Point

Standard questionnaires earn their place in fund diligence, where the same questions go to many managers and a common form lets investors compare the answers like for like. Deal questionnaires copied from a generic template are a different matter. They grow long, ask every company the same things, and bury the few questions this particular deal depends on.

Use a template to make sure nothing basic is missed, then cut it down to the thesis. Every question that survives should name the fact it settles and the evidence that will test the answer. The questionnaire below is built that way. Each row carries its test, so it can be trimmed without losing track of what still has to be checked.