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№ 22 Wills & Estates

What Is a Co-Decision-Maker Under Alberta Adult Guardianship Law?

Learn where co-decision-making fits among Alberta's alternatives to guardianship, who can ask for a capacity assessment, and what to confirm with a lawyer.

Wills & Estates4 min readTSLBy the Treadstone Law Team · AlbertaUpdated November 13, 2026
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Key takeaways
  • Co-decision-making and supported decision-making are among the alternatives Alberta says to consider before guardianship.
  • The adult, a relative, a legal representative or a person with a close and substantial personal relationship may request a capacity assessment for specific decision-making.
  • A court may appoint a guardian only if less intrusive alternatives were considered or tried and would not likely be or have not been effective.

When an adult in your family is struggling with decisions, guardianship can feel like the only option. It is a court order, and it takes decision-making authority away from the adult in the areas it covers.

Alberta law has lighter options. This article looks at where co-decision-making and supported decision-making fit among the lighter options, and it points out what to confirm with a lawyer before you start, since how they apply depends on your situation.

This article covers the law of Alberta.

Where co-decision-making fits

Before applying for guardianship, Alberta's government guidance says to consider alternatives. For personal matters it lists supported decision-making, a personal directive, specific decision-making and co-decision-making.

This is not just a suggestion. A court may appoint a guardian only if it is satisfied that the adult lacks capacity to make decisions about the personal matters, that less intrusive alternatives were considered or tried and would not likely be or have not been effective, and that the order is in the adult's best interests.

What the options mean in plain words

Alberta's guardianship information lists co-decision-making and specific decision-making as options for personal matters, and these are different from guardianship, which is a court order that gives a guardian authority over only the personal matters the Court considers necessary. They are different from guardianship, where a guardian acts, decides and gives consents on the personal matters the court grants.

Specific decision-making is a related option. It lets a nearest relative decide for an adult on listed matters, and a nearest relative must have been in contact with the adult in the previous 12 months.

The exact powers, duties and terms of a co-decision-making or supported decision-making arrangement depend on the order and the facts. A lawyer can confirm what applies to your family.

Capacity, and who can ask for an assessment

Capacity is about a particular decision. It means the ability to understand the information relevant to the decision and to appreciate the reasonably foreseeable consequences of the decision or of not making one. An adult is presumed to have capacity until the contrary is determined.

A capacity assessment looks at whether the adult understands the facts to consider and what could happen with each option. Disagreeing with a decision does not by itself mean the person lacks capacity.

Time limits and costs for the assessment

The assessor's form is valid for 6 months for co-decision-making, guardianship or trusteeship applications, and it must be dated in the 6 months before the application is submitted. Start the assessment only when you are close to applying.

Assessment fees are capped by regulation. The Alberta page lists up to $500 for co-decision-making, and applicants in financial hardship can contact the OPGT. Fees can change, so confirm the current amount.

What to do next

Frequently asked questions

Is co-decision-making the same as guardianship?

No. They are listed separately, and the Alberta page names co-decision-making as an alternative to consider before guardianship. A court can appoint a guardian only after considering less intrusive alternatives.

Does the adult need a capacity assessment for co-decision-making?

Whether the adult needs an assessment for co-decision-making is something to confirm with a lawyer, but where an assessor's capacity assessment form is used for a co-decision-making application, it is valid for 6 months and must be dated in the 6 months before the application is submitted. A lawyer can confirm what applies to your case.

Can a family member ask for the assessment?

Yes. A relative, the adult, a legal representative, or a person with a close and substantial personal relationship may request one for specific decision-making.

What if we cannot afford the assessment?

Fees are capped by regulation, and applicants in financial hardship can contact the OPGT.

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. Alberta 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 Alberta. Reach us at 1-844-900-1070 or send our Team a message.

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