Every acquisition, investment, and major contract has a phase where the excitement stops and the checking begins. Lawyers call it due diligence. Founders sometimes call it worse things. It is the process of verifying, before money moves, that the thing being bought is actually the thing being sold.
I have been on the business side of this process, assembling documents and answering questionnaires, without fully understanding the logic behind the questions. Law school supplied the logic. Here is the plain English version.
What due diligence actually is
Due diligence is organized skepticism. The buyer’s team, usually lawyers, accountants, and sometimes technical advisors, reviews the target’s documents and records to answer three questions: Does the seller actually own what it claims to own? What obligations and risks come along with it? And is anything here bad enough to change the price, the terms, or the decision to proceed at all?
That is the whole idea. Everything else is checklist.
What the lawyers check
The categories are remarkably consistent across deals of every size.
Corporate records. Is the company validly formed and in good standing? Do the people signing the deal have authority to sign it? Cap tables get special attention: who actually owns the equity, and are there options, warrants, or handshake promises floating around that dilute it?
Contracts. The team reads the material agreements: customer contracts, supplier agreements, leases, loans. Two things get flagged fast. Change-of-control clauses, which let the other party walk away or demand consent when the company is sold. And assignment restrictions, which can mean a key contract does not automatically come with the deal.
Intellectual property. Does the company own its IP, or does it merely use it? The classic failure: an early developer or contractor wrote core code with no assignment agreement, which means a stranger arguably owns a piece of the product. This single issue has reshaped more deals than almost any other.
Litigation and compliance. Pending lawsuits, government investigations, regulatory licenses, and whether the business actually complies with the rules that govern it. In cross-border deals, this expands into trade controls and foreign investment review.
Employment and benefits. Key employee agreements, non-competes where enforceable, classification of contractors, and any obligations that transfer with the workforce.
Financial and tax. The accountants lead here, but lawyers watch for undisclosed liabilities, guarantees, and tax exposures that survive the closing.
Why deals die in diligence
Rarely because of one catastrophic discovery. Deals die from accumulation: a messy cap table, plus two unassignable contracts, plus an IP gap, plus a compliance question, until the buyer’s confidence in everything the seller said starts to erode. Diligence is as much about testing the seller’s credibility as testing the documents. Surprises are the real killer. A disclosed problem is a pricing conversation. A discovered problem is a trust conversation.
The seller-side lesson
Here is what founders consistently underestimate: due diligence is a test you can study for, years in advance. Clean records, signed IP assignments, a cap table that matches reality, and contracts stored where you can find them are not bureaucratic virtues. They are deal value. Buyers pay for certainty, and discounts start where certainty stops.
That gap, between what businesses need to have handled and what they actually have handled, is where I want to practice. Not because the documents are thrilling, but because getting them right is the difference between a founder’s decade of work converting into value or evaporating in a data room.
Further reading
- CFIUS, Plainly: The Committee That Can Block a Cross-Border Deal
- Setting Up in the US: Legal Basics for Foreign Companies
- Business Law: all posts
I am a law student, not a lawyer. This post is general education, not legal advice. If you are buying, selling, or raising, get deal counsel involved early, ideally before the letter of intent.
