What an Ontario attestation asks for — and how to autofill ON00291 with my-id.ca
Sign an attestation without retyping your personal details
Ontario attestations repeat your legal name, address, contact information, and signature block on every sworn or affirmed declaration you file with a ministry program. 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: Becoming a commissioner for taking affidavits or notary public — ontario.ca
- Form (Central Forms Repository): Attestation — on00291
What this form is about
Form ON00291 is a general Attestation form used with Ontario government processes — confirm when it applies and who must witness it on ontario.ca.
Before you start: what to gather
- Your full legal name and home or business address.
- Phone number and email if required.
- Statement or facts you are attesting to.
- Commissioner or notary if the process requires witnessing.
Confirm the current process on ontario.ca.
How my-id.ca makes it faster
- Save it once. Store your name, address, and contact 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
- Who can witness an attestation?
- Confirm whether a commissioner, notary, or other official is required on ontario.ca.
- How does my-id.ca help?
- It autofills your name, address, and contact details.
- Is ON00291 the same as an affidavit?
- Attestations and affidavits serve different purposes — confirm which form your process requires.
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.