Latest / The Copywriting Podcast with Fexingo: Sales Letters, Headlines, and Persuasive Writing / How a Single Typo in a Headline Boosted Response by 31 Percent
Transcript
- Lucas: So a few months ago I was digging through an old copywriting archive — one of those binders that smells like 1993 — and I found a test result I'd completely forgotten about. Luna: Oh, I love those. What was the test? Lucas: It was a fundraising letter for a land conservation nonprofit. Control package had a clean, professionally typeset headline: 'Save the Last Wild Places.' The test version had one deliberate typo — 'Save the Last Wild PLaces' with a capital P and lowercase L. Luna: A typo? On purpose? That feels like something a nervous intern would get blamed for. Lucas: Exactly, but the funny thing is that the typos version beat the control by 31 percent in response rate — and by almost 40 percent in average donation. The test was run by a consultant named John Forde, who I think was channeling a bit of the old direct mail legend Herschell Gordon Lewis on this one. Luna: Okay, so what was the theory? Was it just that the typo looked more human, less corporate? Lucas: That's part of it, but I think there's something deeper. There's a concept in cognitive psychology called processing fluency — the idea that the easier something is to process, the more we like it. A clean, perfect headline is highly fluent. But a small hiccup — a typo, an odd word choice — it actually makes the reader slow down for a split second. That moment of friction can increase engagement, not reduce it. Luna: Wait, so you're saying a typo can make someone read more carefully? That feels counterintuitive. Lucas: It does. But think about it — when you see a typo in a professional piece, your brain goes, 'Wait, did they mean that? Is this a real person writing this?' That moment of confusion actually forces deeper processing. And if the message is emotionally compelling — like saving wild places — that deeper processing can lead to stronger conviction. Luna: Huh. So it's like a sincerity signal. Like, a polished letter feels like it was written by a committee, while a slightly messy one feels like it came from a real person who cares. Lucas: Yeah, I think that's exactly right. And there's a famous example from the 1990s that reinforces this. A copywriter named Bill Jayme — he was famous for his magazine subscription packages — once sent a test where the outer envelope had a handwritten correction. A word was crossed out and rewritten in pen. That version outpulled the clean version by something like 25 percent. Luna: I love that. So the imperfection signals effort — like someone took the time to personally correct it for you. Lucas: Yes. And this is where I think a lot of modern marketers overcorrect. We run A/B tests where the control is a perfectly optimized landing page — every word tested, every font chosen by committee — and then we wonder why it feels sterile. But sometimes the version that wins is the one that looks like it was written by one human, typos and all. Luna: Okay, but let's be practical. I can't just go tell my boss 'I'm putting a typo in the headline because Lucas said it boosts response.' What's the real takeaway here? Lucas: Right, that would not go well. The takeaway is about intentional imperfection. You don't add random errors. You add a controlled flaw that signals authenticity. For example, if you're writing a fundraising appeal from a small nonprofit, using a slightly awkward phrase — like 'We need your help, truly' instead of 'Your support is critical' — can feel more real. Or, in a B2B context, using a contraction like 'we're' instead of 'we are' in a formal proposal. Luna: So it's about register. The flaw has to be consistent with the voice of the sender. Lucas: Exactly. If Apple put a typo in a product launch headline, it would read as incompetence, not authenticity. But if a local bookstore sends an email with a minor punctuation hiccup, it feels charming. Context is everything. Luna: Right. And I'm guessing the same principle applies to the visual design of copy. Like, using a handwriting-style font versus a clean sans-serif. Lucas: That's actually a great point. There was a study — I think from the Journal of Consumer Research — where they tested a handwritten versus a typed version of a restaurant menu description. The handwritten version led to higher ratings for the food, because it felt more personal and homey. But if the restaurant was high-end, the handwritten version backfired. Luna: So the imperfection has to match the brand's positioning. Makes sense. Lucas: Speaking of typo tests, I came across a modern example from a SaaS company — I think it was a landing page for a project management tool. They ran a test where the headline was 'Manage Your Projects Easy' instead of 'Easily.' The grammatically incorrect version outperformed by 18 percent. The assumption was that it sounded more like how real users talk. Luna: That's fascinating. So they were trading grammatical perfection for conversational authenticity. Lucas: Exactly. And I think that's the real lesson here. The goal isn't to be sloppy — it's to sound human. And humans make mistakes, use contractions, and occasionally write sentences that would make an English teacher cringe. When we polish everything to a mirror shine, we often polish away the personality. Luna: I'm thinking about the opposite too — are there cases where a typo destroyed response? Lucas: Oh, absolutely. There was a famous case from a financial newsletter — I think it was The Agora companies — where a typo in the subject line caused a 60 percent drop in open rates. It was something like 'Your retirement is at risK' with a capital K. That didn't read as human; it read as careless. And financial copy requires maximum trust, so any error signals incompetence. Luna: So the line is fine. A typo that looks like a genuine mistake versus one that looks intentional or careless. Lucas: Right. And I think there's a specific mechanism at play. When a typo is just one character off — like 'recieve' instead of 'receive' — readers often don't even consciously notice it, but their brain registers the deviation. That can actually increase retention of the message, because the brain works a little harder. But a typo that changes meaning — like 'pubic' instead of 'public' — that's a disaster. Luna: Oh no. That's the kind of typo that ends up on a meme forever. Lucas: Exactly. So the safe zone is a subtle error that doesn't change the word's meaning — a missing letter that still leaves the word recognizable. Or a punctuation quirk. Like, I remember reading about a test where a semicolon was used instead of a comma in a long sentence, and it slightly changed the rhythm. The version with the semicolon actually had higher readership. Luna: That makes me think about the power of punctuation in general. I've seen tests where a single comma changed the entire meaning of a sentence. Like, 'Let's eat, Grandma' versus 'Let's eat Grandma.' Lucas: Right, that's a classic. But there's a real-world example from a sales letter for a $14 million offer — I think it was a real estate deal. The original line was 'We cannot accept your offer, without a deposit.' The comma made it sound like they might accept it with a deposit. But the version without the comma — 'We cannot accept your offer without a deposit' — was a flat refusal. That comma cost the sender a lot of money. Luna: Wow. So punctuation isn't just about readability — it's legally binding, almost. Lucas: Exactly. And that's why I think the typo as strategy approach requires a lot of testing. You can't just throw in a random error and hope it works. You have to test the flawed version against the perfect version, and see if the market rewards the imperfection. Luna: So for someone listening who wants to try this — what's a safe first test? Lucas: I'd start with a small, low-risk channel like an email to a segment of your list. Take a subject line that's perfectly written and create a version with a minor typo that doesn't change meaning — like 'Your weekly update' becoming 'Your weekly updatte' — but only if your brand voice is casual enough to allow it. Test it on 10 percent of your list and see if open rates change. Luna: And if it works, do you scale it? Or is the novelty factor important? Lucas: That's the million-dollar question. I suspect the effect diminishes with repetition. If every email from a brand has a typo, it becomes expected and loses its power. The surprise of the imperfection is part of what makes it effective. So I'd use it sparingly — maybe once per campaign, on the most emotionally charged piece. Luna: So it's like a spice. A little bit adds flavor; too much ruins the dish. Lucas: Perfect analogy. And I think the broader lesson here is about the illusion of perfection in marketing. We spend so much time polishing every word, every pixel, every comma — but sometimes the most persuasive copy is the copy that feels like it was written by a human who cares, not a machine optimized for engagement. Luna: I think that's a great note to end on. Lucas, thanks for digging up that old test. I'm going to try a typo on my next email — carefully. Lucas: If today was actually useful to you, if you learned something about how a small imperfection can change response rates, the reason these episodes stay ad-free is listener support. You can find us at buy me a coffee dot com slash fexingo. It's a small way to keep these conversations going. Luna: Yeah, and honestly, every bit helps. We've had listeners tell us they've used these tips in real campaigns — that's what keeps us doing this. Lucas: Exactly. So whether you try a typo or just file this idea away for later, I think the key is to remember that being human in your copy is often the most persuasive move you can make. Thanks for listening.