AI Act Article 51 Explained The EU AI Registry Requirements for US and EU Companies

Last updated May 17 2026 Reading time 9 minutes

The EU Wants to Know About Your AI Systems

The EU AI Act is not just about classifying AI systems or conducting impact assessments. It also requires transparency. Article 51 mandates the creation of a public registry for high risk AI systems.

This is a game changer for accountability. Companies must now disclose their high risk AI systems to authorities. The goal is clear. Ensure that AI systems operating in the EU are traceable. Ensure they are compliant. Ensure they respect fundamental rights.

For US companies this is a wake up call. If your AI system is used in the EU and falls under the high risk category you must register it. Failure to do so could lead to fines up to 7% of your global revenue.

This guide will explain what the AI registry is. It will show you who must register. It will walk you through the process. It will help you avoid the pitfalls.

What Is the EU AI Registry

The EU AI Act establishes a database for high risk AI systems. This registry will be public. It will be managed by the European Commission. It will include key information about each registered AI system.

The purpose is transparency. It allows regulators to monitor high risk AI systems. It allows the public to understand how AI is being used. It ensures that companies are held accountable.

The registry will include information such as

The name and contact details of the provider A description of the AI system Its intended purpose The category of high risk it falls under The date it was placed on the market or put into service The results of conformity assessments

Who Must Register Their AI Systems

Not all AI systems need to be registered. Only high risk AI systems fall under Article 51.

But what does high risk mean in practice

High risk AI systems are those listed in Annex III of the AI Act. These include AI systems used in

Healthcare HR and employment Credit scoring Law enforcement Legal services Critical infrastructure

For US companies the rule is straightforward. If your AI system is used in the EU and falls into one of these categories you must register it.

Here are some examples

AI System Type	Example US	Example EU	Registration Required?
Medical diagnosis AI	IBM Watson Health	Babylon Health’s diagnostic tool	Yes
HR recruitment tool	HireVue’s AI interview tool	A German startup’s resume screener	Yes
Credit scoring AI	A US fintech’s loan approval system	N26’s credit assessment chatbot	Yes
Predictive policing AI	A US company’s law enforcement tool	A French police department’s AI system	Yes
Customer support chatbot	Bank of America’s virtual assistant	BNP Paribas’ client chatbot	No

What Information Must Be Submitted to the Registry

Registering an AI system is not just a formality. It requires detailed information. Here is what you must provide.

Mandatory Information

1 Provider Information The name and contact details of the provider The name and contact details of the authorized representative if the provider is not established in the EU

2 AI System Information A description of the AI system Its intended purpose The category of high risk it falls under

3 Conformity Information The date the AI system was placed on the market or put into service The results of conformity assessments The EU declaration of conformity

4 Technical Information A description of the AI system’s technical specifications Information on the data used to train the system Details on the system’s performance metrics

Additional Requirements

For certain AI systems additional information may be required. For example AI systems used in law enforcement may need to provide details on their accuracy and robustness.

How to Register Your AI System Step by Step

Registering your AI system involves several steps. Here is a detailed guide.

Step 1 Determine If Your AI System Is High Risk

First check if your AI system falls under Annex III. If it does it is high risk and must be registered.

Step 2 Gather the Required Information

Collect all the information listed above. Ensure it is accurate and up to date.

Step 3 Submit the Information to the National Authority

Each EU member state will have a national authority responsible for the registry. Submit your information to the relevant authority.

For US companies with no EU presence you will need to appoint an authorized representative in the EU. This representative will handle the registration on your behalf.

Step 4 Receive Confirmation and Registration Number

Once your submission is approved you will receive a confirmation. You will also receive a unique registration number for your AI system.

Step 5 Keep the Information Up to Date

The registry is not a one time submission. You must keep the information up to date. Any significant changes to the AI system must be reported.

Real World Examples of AI Registry Compliance

Healthcare AI in the EU

A US based healthcare AI company wants to deploy its diagnostic tool in German hospitals. The AI system falls under Annex III as it is used in healthcare.

The company must register the AI system in the EU registry. It must provide detailed information about the system. It must ensure compliance with all AI Act requirements.

The registration process includes

Appointing an authorized representative in the EU Submitting technical specifications and conformity assessments Providing information on the data used to train the AI

HR AI for a Multinational Company

A multinational company uses an AI system for recruitment. The system is used in both the US and the EU. It falls under Annex III as it is used in employment.

The company must register the AI system in the EU registry. It must provide details about the system’s purpose and performance. It must ensure that the system complies with EU standards.

Credit Scoring AI for European Banks

A US fintech company offers its credit scoring AI to European banks. The AI system is used to assess the creditworthiness of loan applicants. It falls under Annex III.

The fintech must register the AI system. It must provide information on the data used and the system’s accuracy. It must ensure that the system does not discriminate against any group.

Common Mistakes in AI Registry Compliance

Mistake 1 Assuming Your AI System Is Not High Risk

Many companies assume their AI systems are not high risk. But if your system is used in healthcare HR credit scoring or other sensitive sectors it likely is.

Always check Annex III. When in doubt consult an expert.

Mistake 2 Failing to Appoint an Authorized Representative

US companies with no EU presence must appoint an authorized representative. This representative will handle the registration process.

Failing to do so can result in non compliance.

Mistake 3 Submitting Incomplete or Inaccurate Information

The registry requires detailed and accurate information. Submitting incomplete or inaccurate information can lead to rejection. It can also lead to legal consequences.

Ensure all information is complete. Ensure it is accurate. Ensure it is up to date.

Mistake 4 Not Keeping the Information Up to Date

The registry is not a one time submission. You must keep the information up to date. Any significant changes must be reported.

Failing to update the registry can result in non compliance.

Mistake 5 Ignoring National Differences

While the AI Act is an EU wide regulation each member state may have additional requirements. Ensure you understand the national rules.

How DilAIg Simplifies AI Registry Compliance

Registering your AI system can be complex. DilAIg simplifies the process.

Our tool guides you through each step. It helps you determine if your AI system is high risk. It assists in gathering the required information. It generates the necessary documentation.

For US companies our tool ensures compliance with both US and EU regulations. It flags EU specific requirements. It helps you navigate the complexities of the AI Act.

Here is how it works.

1 Answer a series of questions about your AI system. What does it do? Where is it used? Who uses it?

2 Our tool analyzes your responses. It determines if your AI system is high risk. It identifies the information you need to submit.

3 We generate a comprehensive registration dossier. It includes all the necessary details. It is ready for submission to the national authority.

4 We provide guidance on appointing an authorized representative. We help you understand national requirements.

Start your registration process today. Begin Your AI Registry Compliance Check

FAQ AI Registry Requirements

Q Who is responsible for registering an AI system

The provider of the AI system is responsible. For US companies deploying AI in the EU this means you must register your system.

Q What if my AI system is used in multiple EU countries

You must register the AI system in each country where it is used. However the EU is working on a centralized registry. This may simplify the process in the future.

Q Can I register my AI system before it is deployed

Yes. In fact it is recommended. Registering early ensures compliance from day one.

Q What happens if I do not register my AI system

You could face fines up to 7% of your global revenue or 35 million euros. You could also face reputational damage and loss of trust.

Q How often must I update the registry information

You must update the registry whenever there is a significant change to the AI system. This could include changes to its purpose data or performance.

Q What is the cost of registering an AI system

The cost varies by country. Some countries may charge a fee for registration. Others may offer it for free. Check with the national authority for details.

Key Takeaways

The EU AI Act’s registry requirement is a critical part of the regulation. It applies to high risk AI systems. These include systems used in healthcare HR credit scoring and other sensitive sectors.

US companies are not exempt if their AI systems are used in the EU. Registering an AI system requires detailed information. This includes provider details system descriptions and conformity assessments.

Common mistakes include assuming your AI system is not high risk and failing to appoint an authorized representative. DilAIg’s tool simplifies the registration process. It guides you through each step. It generates the necessary documentation.

Next Steps

Check if your AI system needs to be registered. Start Your Compliance Check

Appoint an authorized representative if needed. Learn More

Need help? Book a Demo

Join the Conversation

Have you registered your AI system in the EU registry? What challenges did you face? Share your thoughts in the comments or tweet us @DilAIg.

AI Act Article 51 Explained: The EU AI Registry Requirements for US and EU Companies