How to Send a Client Retainer Agreement for E-Signature in Ontario

Getting a retainer signed shouldn't take three days of back-and-forth. Print, sign, scan, email, chase, re-send because the scan was crooked — it's a tax on every new matter you open.

Electronic signatures fix this, and they're perfectly valid in Ontario for retainer agreements. But "valid" depends on doing it properly, and there's a confidentiality question most lawyers overlook: the tool you use to send that retainer is handling a confidential client document.

Here's how to send a retainer for e-signature the right way.

Are E-Signatures Legally Valid in Ontario?

Yes. Ontario's Electronic Commerce Act, 2000 gives electronic signatures the same legal effect as handwritten ones for most documents, including contracts. A retainer agreement is a contract between you and your client, so an electronic signature is enforceable.

There are exceptions — wills and codicils, powers of attorney, and certain other instruments have their own formal requirements — but a standard retainer agreement is squarely within what can be signed electronically.

What Makes an E-Signature Actually Hold Up

Validity in principle isn't the same as a signature that survives a challenge. If a client ever disputes that they signed, you want a record that demonstrates:

1. Intent — the signer took a deliberate action to sign
2. Attribution — you can tie the signature to that specific person (usually via their email and a unique signing link)
3. Consent to sign electronically — the signer agreed to use an electronic process
4. A tamper-evident record — the signed document can't be altered afterward without detection
5. An audit trail — timestamps, and ideally the signer's IP/approximate location, captured through the signing process

A tool that produces a Certificate of Completion covering these points turns "they signed it" into "here is exactly when, how, and from where they signed."

The Part Most Lawyers Miss: Confidentiality

A retainer agreement contains the client's name, the nature of their matter, and your fee arrangement — confidential information under LSO Rule 3.3-1.

When you send it through a US-based e-signature service, that document is stored on US servers, subject to the US CLOUD Act, and often used or retained under terms you haven't reviewed. The same confidentiality analysis that applies to AI tools applies here: you're responsible for knowing where the document goes and who can access it.

For client documents, the e-signature tool should store data on Canadian servers, come with a Data Processing Agreement, and never repurpose your files — the same compliance essentials that apply to any tool touching client information.

How to Send a Retainer for E-Signature (Step by Step)

The mechanics are the same regardless of tool:

1. Start from the retainer PDF in the client's matter
2. Add the signer — the client's name and email (add a second signer for co-clients)
3. Place the fields — drop a signature field, a date field, and a name field where they belong on the page
4. Send the signing link — the client receives a secure, unique link; no account or software required on their end
5. Client signs in their browser — on a laptop or phone, in a couple of minutes
6. You get the signed copy + Certificate of Completion, filed back to the matter automatically

That's it — no printing, no scanning, no version confusion about which copy is the executed one.

What a Defensible Signing Record Looks Like

When the retainer comes back signed, the record you keep should include:

• The fully executed PDF
• Each signer's name, email, and the time they signed
• The approximate location the signature came from
• A Certificate of Completion tying it all together

Keep that with the matter, and you have a signing record that stands up far better than a scanned wet signature ever did.

The Bottom Line

E-signing retainers in Ontario is faster, cleaner, and — done properly — more defensible than paper. The two things to get right are a proper audit trail and keeping the confidential document on compliant infrastructure.

Surface includes e-signature built for exactly this: place fields on any document, send a secure signing link, and get the executed copy plus a Certificate of Completion back in the matter — all on Canadian servers with a DPA available on request. Try it free for 14 days.