How to file a third party claim (Form 29A) — and autofill rcp-29a with my-id.ca
Bring a third party into the action without retyping defendant and third party details
Defendants bringing a third party claim repeat defendant identity, third party defendant names and addresses, counsel contacts, and court file references on every Form 29A Third Party Claim. This guide is an example of storing them once in my-id.ca.
Official form and source
Start from the official source and always use the current version — form numbers and links can change:
- Service page: Ontario Superior Court of Justice — ontariocourts.ca
- Form (Central Forms Repository): FORM 29A- Courts of Justice Act. Third Party Claim — rcp-29a
What this form is about
Form rcp-29a is Form 29A — Third Party Claim under the Courts of Justice Act and Rules of Civil Procedure, where a defendant claims contribution or indemnity from a person not yet a party — confirm joinder on ontariocourts.ca.
Before you start: what to gather
- Defendant (third party claimant) legal name and address.
- Third party defendant name and address for service.
- Plaintiff and other parties for reference.
- Counsel contacts and court file number.
Confirm the current process on ontario.ca.
How my-id.ca makes it faster
- Save it once. Store your plaintiff, defendant, and counsel identity details in your my-id.ca profile.
- Keep documents ready. Upload supporting documents to my-id.ca Files so you are not searching at form time.
- Autofill the form. Use the my-id.ca Chrome extension on a web form, or fill a PDF from your saved profile inside my-id.ca.
- Review and submit yourself through the official channel.
Why do it in my-id.ca
Related Ontario forms repeat the same personal details. Captured once in my-id.ca — stored in Canada, with AI on its own servers — every form starts mostly complete.
Frequently asked questions
- When should I use a third party claim?
- When a defendant seeks contribution or indemnity from someone not in the action — confirm with counsel.
- How does my-id.ca help?
- It autofills defendant and third party names and addresses.
- What defence form follows?
- The third party defendant may file Form 29B.
Fill it once. Reuse it everywhere.
Save your information in my-id.ca once, then autofill this form and the next one — web forms with the Chrome extension, PDFs right in the app. Your data is stored in Canada and AI runs on my-id.ca's own servers, never sent to third-party AI providers.