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The Full and Final Release Clause in an Ontario Separation Agreement Explained

What a full and final release clause in an Ontario separation agreement covers, what it can't touch, and why couples still choose to include one.

Family Law5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-07
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Key takeaways
  • A full and final release is usually a mutual clause: each spouse releases the other from claims connected to the relationship that aren't otherwise dealt with elsewhere in the agreement.
  • - Claims to property division and equalization arising from the marriage or relationship - Claims related to debts each spouse might otherwise try to make the other responsible for -…
  • A release clause is a powerful tool for closing off claims about the past.

You've negotiated your separation agreement — property is divided, support is set, parenting time is scheduled. Near the end of most Ontario separation agreements sits a clause that ties it together: a full and final release, where each of you gives up any further claims against the other arising from the relationship, beyond what the agreement already sets out. It's meant to provide closure. It's also more limited than the word "final" suggests.

This guide explains what a full and final release clause typically covers, what it generally can't touch no matter how it's worded, and why couples still include one.

What the Clause Actually Says

A full and final release is usually a mutual clause: each spouse releases the other from claims connected to the relationship that aren't otherwise dealt with elsewhere in the agreement. In plain terms, it's each person saying "based on everything we've agreed to here, I won't come back later and ask for more" — covering things like property division, past support, and other financial claims tied to the relationship.

What It Typically Covers

What It Generally Cannot Do

Often releasedGenerally not released
Property and equalization claims already accounted for in the agreementA child's right to support, since that right belongs to the child, not the parent
Past support claims up to the date of the agreementFuture ability to seek a variation of support or parenting terms if circumstances materially change
Other financial claims arising from the relationship itselfA court's ongoing role in assessing parenting arrangements based on the child's best interests

A release clause is a powerful tool for closing off claims about the past. It's not a tool for permanently locking in every term forever, regardless of how life changes — Ontario's family law system generally allows a party to bring a motion to change an existing support or parenting arrangement where circumstances have genuinely shifted, and a release clause doesn't override that.

Why Couples Include One Anyway

Even with those limits, a full and final release still does real work: it gives both people confidence that the agreement they signed actually resolves what it says it resolves, rather than leaving one party wondering if a new claim about the same issues could surface months or years later. For most separating couples, that certainty about the past is exactly what they're looking for, even knowing that genuinely changed future circumstances are handled separately.

Common Mistakes in Drafting a Release Clause

Frequently asked questions

Does a full and final release stop my ex from ever asking for more child support?

No. Child support is legally the right of the child, not either parent, and a release clause between the parents can't eliminate it. Support amounts can still be reviewed or varied through the proper process if circumstances change.

Can the release cover a debt we forgot to mention in the agreement?

Only if it's actually connected to claims the release language covers and was fairly disclosed. A release isn't a substitute for identifying every asset and debt properly in the agreement itself — vague or generic language creates uncertainty, not protection.

If we sign a full and final release, can either of us still go back to court later?

For most of what the agreement settles, no — that's the point of the release. But Ontario's family law system generally still allows a motion to change certain terms, like support or parenting arrangements, if circumstances have genuinely and materially changed since signing.

Is a full and final release the same as a divorce?

No. A separation agreement with a release clause resolves the property, support, and parenting issues between spouses, but it doesn't end the marriage itself — a divorce is a separate legal step, granted only by the Superior Court of Justice.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario 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 licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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