For years, financial services email marketing has followed a familiar playbook: send the right message to the right person at the right time. 

However, under the FCA’s Consumer Duty (a strict regulatory requirement, not just a best practice), that’s no longer sufficient. 

The FCA isn’t just interested in whether a message was delivered. It wants to know whether that message was understood, useful to the recipient, and ultimately helped someone make the right decision. These are very different standards to the old playbook, because understanding can’t be assumed – it needs to be tested and evidenced through real customer outcomes and behaviour. 

What’s interesting is how closely Consumer Understanding under Consumer Duty aligns with strong email marketing best practices. The best programs have never been about just sending – they’ve been about reaching the inbox, earning attention, and driving meaningful action. But those signals are getting harder to trust. 

Table of Contents

1. Roadblocks Preventing Consumer Understanding 
2. What Good Consumer Understanding Looks Like
3. What Leading Firms Are Doing Differently
4. Email Is Now Part of Your Evidence
5. Why This Is Bigger Than Marketing
6. That’s Where Adestra Comes In 

Roadblocks Preventing Consumer Understanding 

Consumer Duty tells us: if a customer misinterprets, hesitates, or fails to act, that’s an understanding gap – and firms are expected to investigate and address those issues. 

But even before factoring in consumer understanding, today’s senders must contend with challenges like bot clicks, spam filtering, and deliverability issues. These can distort performance reports, creating the illusion of engagement where none exists. 

In worst-case scenarios, you may think customers are interacting with your emails when, in reality, they’re not even seeing them. 

That’s why this shift goes beyond content. If Consumer Duty is about proving understanding, then deliverability, data quality, and measurement accuracy all become part of your evidence. What used to sit under optimisation now sits squarely under accountability. 

What Good Consumer Understanding Looks Like 

Under Consumer Duty, activity isn’t proof. If behaviour doesn’t align with the message, understanding hasn’t happened. 

When consumer understanding works, customers move with confidence. They choose the right products, complete journeys without friction, and don’t need to seek clarification. Complaints fall. Completion rates rise. 

When it’s not working, the signals might be subtler – but are far more telling. Opens look strong, but completion drops. Clicks come in, but journeys stall. Customers engage, then abandon – or take actions that contradict the message. 

This is where many email programs quietly fail. Not because messages weren’t sent – or even opened – but because they didn’t translate into understanding. 

What Leading Firms Are Doing Differently 

The financial services firms making real progress aren’t treating Consumer Duty as a compliance exercise. They’re redesigning how email works across the business. 

They start by shifting the focus from campaign metrics to customer outcomes — connecting email activity to what happens next: conversions, drop-offs, and decision quality. They identify where journeys stall and where messages fail to drive action. 

They also clean the signal. Deliverability is treated as foundational – because if a message isn’t seen, it can’t be understood. Bot traffic is filtered out, and engagement is redefined around verified human behaviour. 

And critically, they test for comprehension – not just interaction: 

• Did the customer choose the right option? 
• Did they complete the journey? 
• Did they avoid unnecessary risk? 
• Did they need to seek clarification elsewhere? 

Email Is Now Part of Your Evidence 

Email is no longer just a marketing channel. It’s one of the most measurable, auditable ways to show what you communicated – and what happened next. 

You can track who received a message, how they engaged, and whether they followed through or dropped off. Few channels offer that level of visibility from communication to outcome. 

That makes email an incredibly powerful asset for financial services firms. But it also raises the stakes: 

• If messages don’t reach the inbox, they never had a chance. 
• If engagement signals are unreliable, your evidence weakens. 
• If journeys aren’t connected, you lose sight of outcomes. 

What looks like a strong program on the surface can quickly become difficult to defend – because the link between message and behaviour isn’t clear, consistent, or credible. 

Why This Is Bigger Than Marketing 

One of the biggest shifts under Consumer Duty isn’t just what you say – it’s where responsibility sits. 

Understanding doesn’t belong to a single team. 

It’s not something compliance can sign off on. Not something marketing can optimise in isolation. And not something deliverability can solve alone. It runs across the entire organisation. 

Whether a message is understood is shaped by everything around it: data quality, journey design, messaging consistency, measurement accuracy, and whether your emails even reach the inbox. 

Understanding isn’t created in a campaign. It’s the outcome of multiple systems working – together or not. 

That forces a different way of working. Email stops being a channel you send through and becomes a shared layer across the business – where customer experience, data, technology, and regulation converge. 

That’s Where Adestra Comes In 

If you need to prove customer understanding, you need more than campaign metrics. You need confidence that your emails are reaching real people, that your data reflects genuine behaviour, and that you can connect every message to a measurable outcome. 

Adestra helps you do exactly that – combining deliverability expertise, clean engagement signals, and data you can trust to show what customers actually did next. 

To learn more about how Adestra supports financial services organisations across their marketing, transactional, and customer communications strategies, download our eBook: Engagement without compromise for financial services or book a demo with one of our financial services marketing experts today.