Mary Paterson

Partner, Litigation and Tax Litigation Osler, Hoskin & Harcourt LLP

  • Toronto ON

Seasoned commercial litigator and trial lawyer with a practice in tax litigation, contract disputes, and insolvency proceedings.

Contact

Biography

Mary has appeared in the Ontario Court of Appeal, the Ontario Superior Court (including the Commercial List), the Federal Court, the Alberta Court of Queen’s Bench, the Manitoba Court of Queen’s Bench, the Supreme Court of Newfoundland and Labrador, and the Tax Court of Canada.

Industry Expertise

Legal Services

Areas of Expertise

Class Actions
Insolvency & Restructuring
Litigation
Pro Bono
Tax Controversy & Litigation

Accomplishments

Recognized as a Future Star by Benchmark Litigation Canada in 2015.

Benchmark Litigation Canada, 2015
Recognized for her pro bono work on behalf of a UN employee who obtained widower’s benefit after his same-sex partner died while working for the UN. Precedent setting case was recognized by Lexpert Magazine’s Zenith Award in 2011.

Education

University of Calgary

B.Comm.

University of Calgary

B.A.

Osgoode Hall Law School

LL.B.

Affiliations

  • Director Project Work
  • Law Society of Upper Canada
  • The Osgoode Society

Languages

  • English

Media Appearances

Osler lawyer’s efforts make traffic court disclosure the norm for self-represented litigants in Ontario

Financial Post  print

2014-12-17

The pro bono efforts of Mary Paterson, a lawyer in Osler, Hoskin & Harcourt’s Toronto office, have been instrumental in making Crown disclosure a reality for self-represented litigants in Ontario’s traffic court.

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SCC issues ‘big change’ to contract law – Sattva gives last word to trial judges, arbitrators

Law Times  online

2014-08-11

Arbitrators and trial judges should have the last word in most cases that turn on the interpretation of contracts, the Supreme Court of Canada has found.

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Turnaround Management Association Names Sale of Arctic Glacier as Transaction of the Year

Osler  online

2013-09-09

We are proud to announce that the Turnaround Management Association (TMA) has awarded the Transaction of the Year, in the mid-size company category, to the sale of Arctic Glacier.

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Event Appearances

Class Action Preparedness Brief - Multijurisdictional Matters (Speaker)

Osler Client Program, Class Actions  

2015-10-26

Walking the Tightrope: How to Manage Risk Today to Prevent Tomorrow's Class Action (Speaker)

Osler Client Program  

2015-10-01

Articles

Tax disputes on the rise as government increases audit resources

Osler Year in Review

2016-12-06

In response to mounting public concern over tax avoidance and evasion, the federal government in Budget 2016 announced the dedication of an additional $444.4 million to the Canada Revenue Agency (CRA) over the next five years to combat these issues. A Standing Committee on Finance was convened to study the CRA’s efforts in this regard. The federal funds are slated for hiring additional auditors and specialists and combatting criminal tax evasion, and are expected to generate an additional $2.6 billion in revenue for the federal government.

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Alberta court grants Encana’s application for a stay of action and referral to arbitration

Osler Update

2016-04-22

On April 12, 2016, the Alberta Court of Queen’s Bench stayed an action started by Toyota Tsusho Wheatland Inc. (TTWI) against Encana Corporation (Encana) and referred the vast majority of the claims to arbitration. The Court’s decision, reported in Toyota Tsusho Wheatland Inc. v. Encana Corporation, 2016 ABQB 209, upholds the contractual autonomy of parties to have their disputes determined by mandatory arbitration, even where the arbitration touches on the interests of third parties not privy to the arbitration agreement.

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Your First Civil Trial 2016: Procedural Tips for Trial Preparation

Ontario Bar Association

2016-03-22

At this half-day program, prominent litigators share with you their time-tested strategies and practical advice on topics ranging from preparing your case to the closing argument.

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