The Identity Gap: Privacy vs Compliance. Why Selective Disclosure Is the EUDI Wallet’s Most Powerful Feature.

What Does Selective Disclosure Mean (in Simple Terms)?

Think about the last time you were asked to prove your age online. You probably uploaded a photograph of your passport or driving licence, and along with it handed over your name, address, date of birth, document number, and photograph, to confirm a single fact: that you are old enough to proceed. 

The organisation asking the question needed one piece of information. You provided five. 

Selective disclosure changes this. With the EUDI Wallet, a consumer can present a verified confirmation that they meet an age threshold (via a simple yes or no) without revealing anything else. No name. No address. No date of birth. The service receives the answer it needs and the customer retains everything else. 

This is the principle at the heart of the EUDI Wallet: minimum data, maximum trust. 

It sounds simple. The reason it has not existed at scale until now is that it requires a shared and trusted infrastructure, and a credential that any organisation can verify without needing to see the underlying document. The EUDI Wallet, mandated under eIDAS 2.0 across all 27 EU member states, provides exactly that infrastructure.

Why 63% Is Actually a Conversion Number.

The 63% uplift from selective disclosure is the highest single adoption driver identified in our research. Nothing else moves the needle as far, and the breakdown by age group makes the commercial case even clearer: 

• Gen Z (18–29): 74% more likely to use the wallet with selective disclosure 

• Millennials (30–45): 70% more likely 

• Gen X (46–61): 63% more likely 

• Boomers (62–80): 51% more likely 

Even more than half of Boomers (the most sceptical age group) say they would be more likely to use the wallet if minimum data sharing were guaranteed. 

This sends a very clear message to financial services, and it has direct business implications. The consumers most likely to respond to selective disclosure (Gen Z and Millennials) are also the most likely to abandon an onboarding flow when verification feels intrusive or excessive. Selective disclosure addresses the reason they leave. Institutions that lead with selective disclosure and that design onboarding flows around minimum data and promote that principle to customers will convert more of the people they are currently losing. Not because they have made verification easier, but because they have made it feel fairer.

What Consumers Will and Will Not Share and Why that Distinction Matters.

IDnow’s research also reveals something important about the conditions under which consumers are willing to share personal data, which has important implications for how wallet-based onboarding should be designed and communicated. 

Consumers are pragmatic. They will share data when the purpose is clear and the benefit is tangible. For example, 62% said it was acceptable for the EUDI Wallet to share their data for fraud protection and security purposes, and 50% accepted it as a way of avoiding repeated identity checks. 

But acceptability drops sharply when the purpose shifts to commercial use, with just 18% accepting it for advertising and marketing. 

Consumers will share data when they understand what it is for and when the benefit — security, convenience, reduced friction — accrues to them. They will not share it when the benefit is primarily for the institution. This is a new constraint on how identity verification should be designed.

The GDPR Connection: Data Minimisation Is Already the Law.

There is a regulatory dimension to selective disclosure that goes beyond the EUDI Wallet framework itself. GDPR requires that personal data be limited to what is necessary for the purpose of processing. In practice, this means that collecting a full date of birth to verify that a customer is over 18 is not just inefficient, strictly speaking, it is a compliance risk, as you are collecting more data than the purpose requires. 

The current identity verification model creates this risk at scale. Every document upload, every selfie, every manual review collects and stores more personal data than the specific transaction demands. The cumulative data liability is significant, and largely invisible until something goes wrong. 

Selective disclosure structurally resolves this. When a customer presents a wallet attribute confirming they meet an age threshold, no date of birth is transmitted, stored, or processed. The compliance obligation is met. The data liability does not arise. GDPR’s data minimisation principle is now satisfied by design, not by policy. 

For legal, compliance, and data protection teams, this matters. Rather than building post-hoc data minimisation policies around a verification process that inherently over-collects, selective disclosure makes minimum data the default at the point of collection. The compliance posture improves not because the policy changes, but because the architecture does.

The EUDI Wallet Opportunity in a Sentence.

Selective disclosure is the feature that turns the EUDI Wallet from a compliance obligation into a competitive advantage. The 63% of consumers who say it would make them more likely to use the wallet are telling you exactly what to build and exactly how to communicate it. 

Institutions that lead with data minimisation, design flows that request only what they need, and make that principle visible to customers will convert more, carry less data liability, and build the kind of trust that the EUDI Wallet’s rollout demands. The IDnow Trust Platform’s Decide layer is built around this principle and enables institutions to request only the specific attributes required for each transaction, present that request to customers in a way that makes the purpose clear, and deliver an onboarding experience that converts because it respects the customer’s data.

The selective disclosure findings go deeper in the full report — including how data-sharing acceptability varies by purpose, age group, and market, and what the full breakdown of adoption drivers looks like across demographics. If you’re designing an onboarding flow for the EUDI Wallet era, this is the data you need.

Of course, selective disclosure only works if your integration supports every customer not just the digital-first ones. In Blog 3 of the Identity Gap EUDI Wallet series, we look at the onboarding preference data: 24% of consumers still prefer branch verification, 16% won’t open a bank account online at all, and digital wallets are already the second most popular method despite 51% of people having never heard of them! Here’s what that means for your integration strategy. [link] 

FAQs on Selective Disclosure.

By

Jody Houton
Senior PR & Content Manager at IDnow
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