The Most Common Mistakes in Initial EUDAMED Actor Registration and How to Avoid Them

Since 28 May 2026, EUDAMED Actor Registration and UDI/Device Registration have been mandatory for all economic operators placing medical devices or IVDs on the EU market. Manufacturers registering for the first time often underestimate how many points in the process a single mistake can affect and how much that can delay market access.

The good news: most of these mistakes are well known, well documented, and avoidable. This article walks through the five most common pitfalls in EUDAMED registration and what to do instead.

How EUDAMED Actor Registration Works, in Brief

Before looking at the mistakes, it helps to understand the process itself, since many problems arise from skipping or misunderstanding one of its four phases.

First, you need to confirm your roles, align your legal entity data with your official records, and download and sign the Declaration on Information Security Responsibilities. Next, you submit your data through the EUDAMED portal; non-EU manufacturers additionally select their already-registered EU Authorized Representative (EU-REP; formerly known as EC-REP) and upload a mandate summary document at this stage. The relevant national competent authority then reviews the request and, once approved, issues the Single Registration Number (SRN); EUDAMED itself only performs a duplicate check and does not make the substantive decision, which rests with the authority. Only after that comes device linkage in the UDI/Device module, where every device record must reference the correct manufacturer SRN.

Four phases, four opportunities for delay. The mistakes below tend to occur in roughly this order.

Mistake 1 – Bringing In Your EU Authorized Representative Too Late

One of the most consequential mistakes affects non-EU manufacturers who start their Actor Registration without notifying their EU-REP in advance, or without checking whether the EU-REP itself already holds its own SRN. Mandate verification is not automatic: the EU-REP must actively confirm the registration request before the national competent authority even takes action.

If this coordination isn't clarified upfront, the request simply sits in limbo. Not because the authority is slow, but because the required verification step is missing. The simplest fix is to agree on the registration sequence and data handover with your EU-REP in advance, rather than sorting it out at the point of submission. For more on what an EU-REP actually does and why non-EU manufacturers are legally required to appoint one, see our article "What Is an EU Authorized Representative?"

Mistake 2 – Starting Registration Too Close to the Deadline

Processing times at national competent authorities aren't fixed, they depend on current workload, which naturally increases as deadlines approach. Manufacturers who start registration only a few weeks before a deadline risk having their Actor Registration still pending even though all documentation was submitted correctly.

This is particularly relevant right now for manufacturers registering legacy devices ahead of the 27/28 November 2026 deadline (see our article on the EUDAMED legacy device deadline for details). If Actor Registration – the prerequisite step – isn't complete yet, it should be prioritised now, independent of the device portfolio itself.

Mistake 3 – Inconsistent Master Data and the “One SRN Covers Every Role” Assumption

The legal name and address entered in EUDAMED must match, exactly, what appears on labelling, certificates, and technical documentation. Discrepancies, a different spelling of the company name, or an outdated address, trigger queries from the authority and delays that are easily avoidable.

A second, equally common misunderstanding: if a single legal entity performs multiple roles, such as manufacturer and importer at the same time, it needs a separate SRN for each role, not one shared SRN. This assumption is usually corrected too late, typically only once a device registration fails because a second SRN is missing.

Mistake 4 – Basic UDI-DI Strategy and Nomenclature Without Regulatory Review

When it comes to assigning Basic UDI-DIs, two opposite mistakes occur regularly: creating too many, which clutters the portfolio unnecessarily, or too few, by incorrectly grouping products with different intended purposes or risk classes. Both are considerably more work to correct after the fact than to get right the first time.

A related issue is confusing GMDN and EMDN codes: EUDAMED requires EMDN codes at the required “leaf” level, yet many manufacturers default to GMDN codes – often carried over from an FDA submission – or select EMDN codes at too general a level. A technically successful file upload doesn't guarantee the underlying data is correct; this often only surfaces during an audit.

Mistake 5 – The SRN Is the Starting Point, Not the Finish Line

The process doesn't end once the SRN is issued, even though it can feel that way. Two follow-up steps are routinely forgotten: setting up the right user access, and completing the actual device linkage in the UDI/Device module.

Every actor needs at least one active Local Actor Administrator (LAA) at all times; the European Commission recommends appointing at least two, so access doesn't depend on a single person being available. From there, further rights should be assigned according to each employee's actual role: for example a Local User Administrator (LUA) to manage day-to-day user access, or a Confirmer for the UDI/Device module to submit device data, rather than leaving everything with the LAA.

Without these access levels in place, the team can't effectively work in the system, even though the organisation is formally registered. And without the correct linkage between device data and your own SRN, Actor Registration remains an isolated administrative step rather than the foundation for complete market-access documentation.

At a Glance: Mistakes and Fixes

Frequently Asked Questions

Is EUDAMED Actor Registration mandatory now?

Yes. Since 28 May 2026, EUDAMED Actor Registration and UDI/Device Registration have been mandatory for all economic operators placing medical devices or IVDs on the EU market.

What is a Single Registration Number (SRN)?

The SRN is the registration number that the relevant national competent authority issues once it approves an Actor Registration request. EUDAMED itself only performs a duplicate check; the substantive decision rests with the national authority.

Does a company need a separate SRN for each role it performs?

Yes. If a single legal entity performs multiple roles. For example, manufacturer and importer at the same time, it needs a separate SRN for each role, not one shared SRN.

What happens if my EU Authorized Representative hasn't confirmed my registration?

The request stays pending. Mandate verification is not automatic: the EU-REP must actively confirm the registration request before the national competent authority takes action, so coordinating with your EU-REP in advance is essential.

How many Local Actor Administrators (LAAs) does an organization need in EUDAMED?

At least one active LAA is required at all times. The European Commission recommends appointing at least two, so access doesn't depend on a single person being available.

Conclusion

Most mistakes in initial EUDAMED Actor registration don't stem from a lack of regulatory knowledge, they stem from treating registration as a one-off administrative task rather than a coordinated process between manufacturer, EU-REP, and authority. Clarifying coordination with your EU-REP early on recovers the most time at exactly the point where most registrations stall.

Appoint us as your EU Authorized Representative, and we'll handle Actor Registration, SRN applications, and UDI/Device Registration on your behalf: from data review through to ongoing portfolio maintenance.