The Clause Eun-ji Almost Signed Away in a Napanee Deal

The situation

Eun-ji read the email twice before she believed it. The logistics company she had agreed to buy for a price in the mid six figures short of eight million dollars had, three weeks after she signed the purchase agreement and two weeks before closing, lost the customer that accounted for close to a third of its revenue. The seller's lawyer, Hui, had forwarded the customer's termination notice almost as an afterthought, folded into an update about scheduling the final walkthrough, as if it were a detail rather than the fact that changed everything about the deal she thought she was buying.

Eun-ji had immigrated to Canada eight years earlier and built a career as a commercial landlord, holding a small portfolio of industrial units around Kingston and eastern Ontario. Buying an operating business — Wei's Napanee-based logistics company, with a fleet, staff, and long-standing contracts — was meant to be the next step, a way to move from collecting rent to running something with more upside. She had negotiated hard on price and had insisted, on the advice of a business forum she had found late one night, that the purchase agreement include what the forum called a standard material adverse change clause, on the theory that it was boilerplate every serious buyer included and nothing more.

That advice was not wrong that the clause belonged in the agreement. It was wrong about what came next. The same forum thread had told her that once triggered, a material adverse change clause was self-executing — that she could simply announce the deal was off and walk away, with no further steps required. Believing that, Eun-ji had already sent Hui an email stating she considered the agreement terminated, before she had spoken to anyone who could tell her whether that email was legally sound or whether it might itself be treated as a breach.

By the time she called our office, two problems existed at once: a business that had genuinely become less valuable than the one she had agreed to buy, and a self-inflicted procedural misstep that risked handing Wei's side an argument that she, not the lost customer, had broken the deal.

What the law actually said

A material adverse change clause, sometimes called a MAC clause, can give a buyer a route out of a signed purchase agreement, or in some cases grounds to renegotiate its terms, if something happens between signing and closing that substantially and negatively affects the value or prospects of the business being bought — but only on the terms the clause is actually drafted with, and the bar tends to be high, since the change generally needs to be substantial, unexpected, and lasting in its effect rather than a short-term dip or a downturn dragging down the whole industry, and most clauses carve out exactly those situations. It exists for situations like this one: a buyer agrees to a price based on the business as it exists at signing, and a clause drafted broadly enough protects against that picture changing for the worse before ownership actually transfers.

What the forum thread had gotten wrong was the mechanics. A MAC clause is not a light switch. Whether a given event actually qualifies as a material adverse change is a question of interpretation, turning on the specific wording of the clause Eun-ji's agreement contained, on how significant the change was relative to the size of the business, and on whether the clause carved out certain kinds of change — the loss of a single customer, for instance, is sometimes expressly excluded in agreements drafted to protect sellers from exactly this argument. Eun-ji's clause, we found on review, was broadly worded and did not carve out customer loss, which put her on solid ground substantively. But invoking the clause by unilateral declaration, without formal notice in the form the agreement required, and without giving Wei's side the contractual opportunity to respond that the agreement itself set out, meant her email had not actually terminated anything. It was, at best, the opening move in a negotiation she had not realized she was starting.

This mattered because Hui had already replied insisting the loss of one customer, however large, did not meet the threshold the clause required, and treating Eun-ji's earlier email as a repudiation — an outright refusal to complete the deal — that could expose her to a claim for damages if she simply stopped participating. The actual legal question was narrower and more favourable to her than either side's early positioning suggested: not whether she could walk away by announcement, but whether the drop in revenue was serious enough, under the specific words of her own clause, to justify formally invoking it, and what steps the agreement required her to take to do that properly.

What we did

1. Reviewed the exact wording of the material adverse change clause against the events that had occurred. We compared the clause's definition of a qualifying change to the customer's termination notice, the percentage of revenue involved, and the absence of any carve-out for customer attrition, to determine whether Eun-ji had a genuine substantive basis to invoke it, rather than relying on the general impression that any bad news would qualify.
2. Withdrew the earlier informal termination email and replaced it with a formal notice. Because Eun-ji's first email had not followed the notice procedure the agreement specified, we sent a corrected communication that formally invoked the clause through the proper channel, preserving her position without conceding that the earlier email had been a valid or binding repudiation of the deal, so whatever followed was built on solid procedural ground rather than a message she could not take back.
3. Quantified the impact of the lost customer on the business's value. We calculated the departing customer's trailing revenue contribution and applied the same valuation multiple the parties had used to price the business at signing, translating the loss into a defensible dollar adjustment rather than a vague sense the business was now worth less, so any renegotiation was anchored to numbers Wei's side could not easily dispute.
4. Opened renegotiation rather than immediately pursuing termination. Once the notice was properly served, we approached Hui with two options on the table — a reduced purchase price reflecting the lost revenue, or termination of the agreement — making clear Eun-ji was not bluffing but giving Wei's side a commercially sensible way to keep the deal alive, since walking away outright would have cost Eun-ji months restarting her search without recovering any of the value the lost customer represented.
5. Negotiated the price adjustment and documented it as a formal amendment. After two rounds of exchange, we reached a revised price that reduced the purchase amount by an amount in the mid six figures, reflecting the lost customer's contribution to revenue, and papered the change as a signed amendment to the purchase agreement so there was no ambiguity about what Eun-ji was now buying and at what price.
6. Rebuilt the closing timeline around the amended terms. With the price settled, we confirmed the remaining closing conditions were still satisfied, updated the closing documents to reflect the new purchase price and any adjusted financing figures, and reset a closing date that gave Eun-ji's lender time to confirm the revised numbers, so the five weeks already lost to renegotiation did not compound into further slippage while financing was re-underwritten against the lower price.

The outcome

Eun-ji closed on the business roughly five weeks later than originally scheduled, at a price reduced by an amount in the mid six figures from the original agreement, reflecting the value of the customer relationship the company had lost. The clause did what it was designed to do: it did not let her simply escape a deal she had gotten cold feet about, but it gave her real leverage once the business she had agreed to buy had genuinely changed for the worse.

The correction of the earlier email mattered more than Eun-ji initially realized. Had she continued treating her informal message as a valid termination and stopped engaging, Wei's side could plausibly have argued she had repudiated the agreement, exposing her to a claim for the difference between the agreed price and whatever Wei eventually sold the business for elsewhere. Formalizing the notice properly, and using it as the basis for negotiation rather than a unilateral exit, converted a legally shaky position into a strong one.

Eun-ji now owns the logistics company at a price that reflects what it is actually worth, with the amendment on file documenting exactly why the original price no longer applied. The lesson she took from the experience, and repeated to us afterward, was less about the clause itself than about the gap between reading a document online and reading her own document with someone who could tell her what it actually required her to do.

What you can learn from this