CASL and AI-Generated Marketing Emails

CASL applies to a marketing email no matter who or what wrote it — so when AI drafts the copy, you still need consent to send, clear sender identification, and a working unsubscribe. AI changes how fast you can write the words; it changes nothing about your right to send them. The real risk is that AI lets you spin up far more campaigns than your consent base can lawfully carry.

AI has made producing marketing email almost too easy. A prompt and a few seconds gets you a subject line, three body variations, and a call to action. The pull is to treat the whole channel as a volume game — more messages, more variations, more sends. Canada's Anti-Spam Legislation, CASL, is why that instinct lands businesses in trouble. CASL doesn't care who or what wrote the message. It cares whether you had the right to send it, whether the recipient knows who you are, and whether they can make you stop.

CASL applies to the message, not the author

A commercial electronic message under CASL is, broadly, any electronic message that encourages participation in a commercial activity — a promotional email, a sale announcement, a "we miss you" re-engagement note. If it's commercial and it's headed to an electronic address, CASL applies. Whether a human wrote it, a template spat it out, or a large language model drafted it changes nothing. The three core obligations attach to the send, not to the keyboard.

What are the three CASL rules AI cannot bypass?

Every commercial electronic message has to satisfy all three, whoever drafted it:

Consent. Before you send a commercial electronic message, you generally need the recipient's consent — express or, in narrow circumstances, implied. Express consent means the person actively agreed to hear from you: a box they checked that wasn't pre-checked, a clear opt-in. Implied consent is narrower than most businesses hope — it can flow from an existing business relationship, like a recent purchase or inquiry, but it's time-limited and situation-specific. AI can help you write to a list; it can't manufacture consent for the addresses on it. If anything, how easy it's become to generate campaigns makes it more tempting to message people you have no consent to reach — which is exactly the behaviour CASL exists to stop.

Sender identification. Every message has to clearly identify who's sending it and carry valid contact information — your name or your business's name, and a way to reach you that stays good for at least 60 days after the message goes out. AI-generated copy sometimes drops or mangles this, especially when you ask a model for "punchy" short-form content. The identification isn't optional polish; it's a legal requirement of the message itself.

Unsubscribe. Every commercial message has to include a working, easy-to-use unsubscribe mechanism, and you have to act on a request without delay — and no later than 10 business days. It can't be buried, can't force the recipient to log in or jump through hoops, and has to actually work. This is where automation-heavy programs fail most often: the copy's fine, but the mechanism is broken, ignored, or slow.

Where AI specifically trips people up

Scale outrunning consent. The core failure is simple: AI lets you produce far more campaigns than your consent base can lawfully carry. The volume feels like progress; it's actually exposure. Treating email as one more system inside an AI governance process — where output volume stays tied to documented consent — keeps that gap from opening. Grow the campaigns no faster than you grow real consent.

Personalization that misleads. Models are good at warm, familiar-sounding copy — "Hi again, we noticed you were interested in…" — even for people you have no real relationship with. If the message implies a relationship or a prior interaction that never happened, you drift toward the false or misleading representations Canadian law separately prohibits. Don't let AI invent a rapport you haven't earned.

Fabricated specifics. Ask a model to make an offer compelling and it may cheerfully invent a discount, a deadline, a testimonial, or a claim. In a commercial message, a false or misleading claim is its own legal problem. Every factual assertion in AI-drafted copy needs a human to confirm it's true before it goes out.

Broken or dropped compliance elements. When a model rewrites an email for tone or length, it can quietly strip the physical address, the unsubscribe language, or the sender identification. Never let generated copy go out without a human check that all three CASL elements survived the edit.

A simple, durable workflow

You don't need to drop AI to stay compliant — you need to put it inside a process with a few non-negotiables.

Send only to consented contacts, and record the consent. Keep evidence of how and when each recipient consented in a consent record. If you're challenged, the burden's on you to show you had it.

Lock the compliance elements outside the AI. Keep sender identification and the unsubscribe mechanism in your sending platform's template, not in the AI-generated body. That way a creative rewrite can't strip them out.

Human-review every campaign for two things: truth and the three rules. Confirm the claims are accurate, and confirm consent, identification, and unsubscribe are all present and working. It takes minutes and heads off the failures that draw enforcement.

Honour unsubscribes fast and completely. Process them promptly, well inside the 10-business-day window, and make sure a suppression actually pulls the person from every relevant list.

CASL's penalties are steep, and enforcement is real. But compliance here isn't complicated — it's the same three rules it's always been. AI changes how fast you can write the words. It changes nothing about your obligation to have the right to send them, to say who you are, and to let people go.

*This article is general information, not legal advice; consult a qualified professional about your specific situation.*

At Canuckt we build privacy-first tools for Canadian businesses, and Valdra's CASL consent centre helps you keep consent records, sender details, and unsubscribe handling in order — so AI can speed up your writing without speeding you past the rules.