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Can One Lawyer Act for Both Buyer and Seller in New Brunswick?

Wondering if one lawyer can act for both sides of a business sale in New Brunswick? Learn about conflicts of interest, the risks and the alternatives.

Buying & Selling a Business5 min readTSLBy the Treadstone Law Team · New BrunswickUpdated November 13, 2026
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Key takeaways
  • A buyer and seller often want opposite things on price, liabilities and tax, which is why shared representation needs careful thought.
  • Whoever acts for you should be a practising member of the Law Society of New Brunswick.
  • Alternatives include separate lawyers, one lawyer for one side only, or independent advice on a limited basis.

When a buyer and seller already know and trust each other, sharing one lawyer can look like a sensible way to save time and cost. It can feel awkward to hire separate advisers against someone you get along with.

This article explains, in general terms, why a conflict of interest arises in a business sale, what to ask before agreeing to joint representation, and what the alternatives are. Whether a particular arrangement is permitted depends on the rules that govern lawyers and on your facts, so it should be confirmed with a lawyer.

This article covers the law of New Brunswick.

Why the question is harder than it looks

A lawyer's job is to protect the interests of the client. In a business sale, the buyer and seller are on opposite sides of the table. Even when they are friendly, their interests are not the same, and a single lawyer cannot push for both at once.

Lawyers are governed by professional rules about conflicts of interest. This article does not set out those rules in detail. A lawyer you approach will be able to tell you whether the rules allow the lawyer to act in your matter and what you would need to agree to.

Where buyer and seller interests pull apart

The deal structure alone shows how interests differ. Here are some common examples.

On each of these, a lawyer acting for the buyer would advise one thing and a lawyer acting for the seller another. A lawyer acting for both cannot freely advise either side to push harder.

When joint representation may be possible, and when it is unwise

Whether joint representation is allowed at all depends on the professional rules and the circumstances, so it is worth asking the lawyer directly. Even if it is allowed, it is usually only worth considering where the deal is simple, the terms are already agreed and both sides understand the lawyer cannot take sides.

It is generally unwise where any of the following apply.

If a dispute arises later, a lawyer who acted for both may not be able to help either of you. That can leave both sides paying for new advice at the worst time.

Alternatives to sharing one lawyer

OptionHow it worksMain consideration
Separate lawyersEach side has its own lawyer.Each side gets advice aimed at its interests.
One lawyer for one sideOne party hires a lawyer and the other does not.The unrepresented party has no one protecting its interests.
Independent advice on key termsThe second party has a different lawyer review the agreement.Cheaper than full representation, but only covers what is reviewed.
Accountant plus lawyerAn accountant advises on tax and structure while lawyers handle documents.Helps with tax points such as the GST/HST election.

Separate lawyers do not have to mean a hostile deal. Many buyers and sellers who get along still find that clear, independent advice on each side makes closing smoother.

What to do next

Do not assume a person who calls themselves a notary can do everything a lawyer can. Every member of the Law Society is a notary public, but a member who is not a practising member may not use any notarial power that involves practising law.

Frequently asked questions

Can one lawyer act for both the buyer and the seller?

How this applies depends on your situation, so it is worth confirming with a lawyer before you agree to share one. Whether it is permitted depends on the facts, so ask the lawyer directly and have them explain what they can and cannot do for each of you.

What if we are family or old friends?

A close relationship does not remove the difference in interests on price, liabilities and tax. It may make it easier to cooperate, but each side may still benefit from independent advice.

Can a student-at-law act for us instead?

Students-at-law may be authorized to practise in limited circumstances under the supervision of a practising lawyer acting as their principal.

How do I check that my lawyer can practise in New Brunswick?

Only practising members of the Law Society of New Brunswick, insured or exempt, are entitled to practise law in the province. Ask the lawyer to confirm their status or check with the Law Society.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. New Brunswick laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a lawyer who practises in New Brunswick. Reach us at 1-844-900-1070 or send our Team a message.

This is a buying & selling a business question

Buying or selling a business with us is from $3,448.85, tax included. Third-party fees are extra.

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