Is there such a thing as a 'legal separation' certificate in Ontario?

No. Ontario does not issue "legal separation" certificates or orders. Separation is a factual state — it occurs when you and your spouse decide to live separate and apart — not a legal status that a court or government office formally grants.

When people say they are "legally separated," they usually mean one of two things: they have been living apart (which makes them separated for legal purposes), or they have signed a separation agreement that documents the terms of their separation. Neither requires a court order, and there is no government document that officially certifies you are separated.

This is different from divorce, which does require a court order and ends the marriage. During the separation period, you remain legally married. Your marital status on government forms is still "married" until a divorce is granted and registered.

If you want proof of your separation for insurance, immigration, or other purposes, a signed and notarized separation agreement is typically the document third parties accept. Some people also exchange a letter acknowledging the date separation began, which creates a dated record without the full cost of drafting an agreement.