Is It Legally Possible?
Generally, yes. Ontario law doesn't generally require a lawyer to draft or review a separation agreement for it to be valid — couples can generally write their own agreement, provided it meets the basic formal requirements for a domestic contract under the Family Law Act.
What It Still Generally Needs to Be Valid
Whether self-drafted or professionally prepared, a valid separation agreement generally needs to be in writing, signed by both parties, and properly witnessed. It also generally needs to be based on full and honest financial disclosure between the parties — an agreement built on incomplete disclosure is generally more vulnerable to being challenged later, regardless of who drafted it.
Common Risks With Self-Drafted Agreements
The general risks of self-drafting tend to come less from the formal signing requirements, which are fairly simple, and more from the substance: missing an issue that should have been addressed, using vague language that creates disputes later, not understanding the legal effect of a particular clause, or not realizing that certain terms (particularly around parenting and children) can't be permanently locked in the way other terms can. See our guide to challenging an agreement for the kinds of problems that tend to come up.
A Middle Ground Worth Considering
Many people land on a middle ground: drafting the general terms themselves, or using a structured tool to organize the key issues, and then having a lawyer review the draft or provide independent legal advice before finalizing and signing — getting some of the cost benefit of self-drafting while reducing the risk of a serious gap or error.
Frequently Asked Questions
Is a self-drafted separation agreement legally valid in Ontario?
It can be, provided it meets the basic formal requirements — in writing, signed, witnessed, and based on full financial disclosure — the same requirements that apply to any separation agreement.
What's the biggest risk of writing my own agreement?
Generally, missing an important issue, using unclear language, or not understanding a clause's full legal effect — these substantive risks tend to matter more than the formal signing requirements, which are relatively simple.
Can I use an online template for my separation agreement?
Templates can be a starting point, but they generally need to be adapted carefully to your specific situation — a generic template that doesn't fit your actual circumstances can create more problems than it solves.
Should I still get legal advice even if I draft the agreement myself?
Generally, yes, it's worth considering — having a lawyer review a self-drafted agreement, or provide independent legal advice before signing, can catch issues while still keeping overall costs lower than full representation.
Can a self-drafted agreement be challenged more easily than a lawyer-drafted one?
Not automatically, but self-drafted agreements can be more prone to the kinds of gaps or disclosure issues that generally make any agreement vulnerable to a later challenge.