Legal due diligence in a small business acquisition is not a formality. It is the process that surfaces undisclosed liabilities, contract restrictions, intellectual property gaps, and regulatory problems that could either kill the deal or create post-close obligations that were not in the purchase price. Most ETA buyers engage an M&A attorney for the purchase agreement but under-scope the diligence review. Here is what a complete legal review covers.
Material Contracts: The Foundation of Legal Diligence
Request every material contract the business has: customer agreements (all contracts generating more than 5% of revenue, and a representative sample of standard customer contracts), vendor and supplier agreements, lease agreements (real property and equipment), software licenses, insurance policies, financing agreements, and any partnership or joint venture arrangements.
For each contract, your attorney reviews: whether it is assignable (many contracts require counterparty consent to assignment, which can block or complicate an acquisition), whether it contains change of control provisions (some contracts automatically terminate or give the counterparty a termination right on a change of control — extremely common in software licenses and government contracts), what the term and renewal provisions are, and whether there are any pending disputes or notices of breach. ABA data shows contract assignment issues appear in 44% of acquisition diligence reviews — it is not a niche problem.
Litigation: What the Seller Is Not Telling You
The standard seller representation is that there is no pending or threatened litigation. The word "threatened" is where sellers frequently undercount. Ask for: all pending litigation (any active case where the business is a party), all closed litigation in the past three years (settled or resolved matters), any regulatory investigations or government inquiries (including OSHA, EPA, DOL, or state agency inquiries), any demand letters or formal notices received but not yet filed in court, and any insurance claims the business has made in the past three years.
Undisclosed litigation appears in 27% of acquisition diligence reviews per ABA data. Of these, approximately 40% are employment-related (wrongful termination, discrimination claims, wage disputes), 30% are customer disputes, and 20% are vendor or supplier disputes. Employment claims are particularly common because they often arise from events that occurred before the sale and the seller believes they are "resolved" even when they are not legally closed.
Intellectual Property: Ownership and Protection
IP diligence covers trademarks (is the business name and logo registered? are there any conflicting marks?), trade secrets (does the business have documented confidentiality policies and agreements with employees who have access to proprietary processes or customer data?), and any patents, copyrights, or software that the business uses or has developed. In an asset purchase, verify that the IP being transferred is actually owned by the selling entity — not by the owner personally, a related entity, or a prior employee who developed it.
IP ownership gaps (IP used by the business but not formally owned by the entity) appear in 31% of diligence reviews. Common scenarios: the business name was never trademarked and a regional competitor could use it; website and marketing materials were created by an external agency under an arrangement where the agency retains copyright; proprietary software was written by an employee who signed no assignment agreement.
Real Estate and Lease Agreements
For businesses that lease their operating location, the lease is often the most important contract in the diligence package. Review: remaining term (a business with 18 months left on a lease has operational continuity risk — will the landlord renew, at what rate?), renewal options (are there options to renew at defined rates, or does the landlord have full pricing power at renewal?), assignment provisions (most commercial leases require landlord consent to assignment in a business sale), personal guaranty (many small business leases require the owner to personally guaranty the lease — you may be asked to step into this guaranty or negotiate a new one), and any exclusivity provisions or co-tenancy clauses if the business is in a multi-tenant retail or office location.
Regulatory and Licensing Review
Every business operates under some regulatory framework. Your attorney should confirm: all required licenses and permits are current and in good standing, whether those licenses transfer automatically in an asset sale or must be re-applied for under new ownership, any pending regulatory proceedings or citations, and whether the business operates in any regulated industry requiring ongoing compliance monitoring (environmental, food safety, financial services, healthcare).
Regulatory or license issues appear in 23% of acquisitions. The most common problem: the business has been operating without a specific required license (often a state contractor's license, professional license, or local business permit) and the seller assumes this is fine because no one has complained. It is not fine. You inherit the liability in a stock purchase, and you may be required to cease operations until the license is obtained in an asset purchase.