Social Security Tribunal of Canada

Added parties

An added party is someone who could be affected by the decision, but who is not the appellant or the respondent

What added parties do

Added parties have the same rights and responsibilities as appellants and respondents. 

If you’re an added party, you can: 

  • file submissions (your arguments about why the appeal should be allowed or dismissed)
  • file evidence such as documents that support your view of the appeal (for appeals at the General Division)
  • take part in the hearing, if there is one
  • invite witnesses to the hearing to support your arguments (for appeals at the General Division)

Like all parties to the appeal, we send added parties copies of all documents relevant to the appeal. This is called the appeal file. Review these documents before the hearing. 

Who are added parties

Added parties are people who may have a direct interest in the decision about whether the appellant gets benefits or not. 

For example:

Employment Insurance

The appellant’s former employer could have a direct interest.

Canada Pension Plan, Old Age Security / Guaranteed Income Supplement

Some people who are related to the appellant could have a direct interest. For example:

  • a spouse or common-law partner
  • a former spouse or common-law partner
  • other family members
  • someone who represents an estate

How a party is added to an appeal

There are three ways to become an added party:  

  • We automatically add you as a party: According to the law, some people need to automatically be added as parties to an appeal. When this happens, we’ll send you a letter telling you that we’ve added you as a party. The letter will explain why you were added. It will also tell you what you need to do. 
  • We identify you as a potential added party: We’ll send you a letter telling you that someone (for example, your former employee) has filed an appeal and we’ll ask if you have a direct interest. The letter will tell you what you need to do. 
  • You ask to be added as a party: If you feel that you have a direct interest in an appeal, you can ask to be added as a party. 

How to ask to be added as a party

If you want to be added as a party, send us a written request with the following information: 

  • the reason(s) you have a direct interest in the decision
  • your first and last name (if an employer or business, the business name and the name of a contact person)
  • your address
  • your phone number
  • your email address (if you have one)

If you have a representative, send us their name and contact information (address, phone number, and, if they have one, an email address).

The Social Security Tribunal (SST) member will review your request and decide whether to add you as a party.

If the General Division member refuses to add you as a party, you can appeal that decision to the Appeal Division.

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