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Line4 Check · Free to use · 3 min read · Updated 10 November 2026 · By Jess Luper

Check a regulatory filing before you submit it.

Choose your country or your framework, then your regulator and return. Line4 Check runs the regulator's own validation rules on your file, in your browser, in seconds. Your file never leaves your computer.

Where do you file?

EU and EEALive

Rest of EuropeComing soon

AmericasComing soon

Asia PacificComing soon

Middle East and North AfricaComing soon

Sub-Saharan AfricaComing soon

30 EU and EEA countries live, using the EBA reporting framework. 180 more listed as coming soon.

Choose your country to see which rules apply.

Live now: banks and investment firms in the 30 EU and EEA countries, for the returns they file under the EBA reporting framework. Everywhere else is coming soon: pick your country and tell us which regulator you need.

What it checks today

Two frameworks are live. We only mark a regulator as live once Line4 Check runs its rules and we have tested the results.

  • EU and EEAEBA reporting framework 4.2, with 4.0, 4.1, 4.3 and 4.4 phase 1 filingsBanks, investment firms and the other firms that file EBA returns with their national authority. 42 modules, 121,859 of EBA's 122,161 active checks, in xBRL-CSV or XBRL-XML.LiveCheck an EBA filing →
  • EU and EEASolvency II QRTs (EIOPA)Insurers and reinsurers, under EIOPA’s rules. 6 returns, 1,360 of EIOPA's 2,096 checks for them, in XBRL-XML on taxonomy 2.8.2 or 2.10.0.LiveCheck your QRTs →
  • Everywhere elseYour regulator’s own rules and taxonomyAny firm that files with a regulator we do not cover yet. We add regulators one at a time, starting with the ones people ask for.Coming soonTell us which you need →

Your file never leaves your computer.

01The checker comes to your fileYour browser downloads the Line4 engine, compiled to WebAssembly, and the rules for the return you check, from line4.ai. They are kept for next time.
02Your file stays in the tabThe file is opened and checked inside your browser, on your own computer. It is never uploaded, stored or seen by Line4.
03No account, no limitFree to use, with no sign-up. If you ask for the report by email, only the report you see is sent, never the file.

See how the EBA check works, step by step, with the size of every download.

A check at submission is the first step to real-time supervision.

When a filing is checked the moment it is submitted, problems are fixed while the figures are fresh, and what reaches the supervisor is right when it lands.

That is what real-time supervision needs, in any country: validated data, sent straight from firms' systems, that supervisors can use as soon as it arrives. Line4 Check shows the first step on your own computer. For regulators, Line4 builds the rest.

What is real-time supervision? →Validation at the gate, for regulators →

EU and EEA: who collects EBA returns

Banks and investment firms in the EU report under the EBA's reporting framework, and Iceland, Liechtenstein and Norway apply it through the EEA Agreement. Each firm sends its returns to its national authority. Checked against the EBA's list of competent authorities and each authority's own reporting pages, 10 November 2026.

Other EBA returns can go to a different body: resolution reports to the resolution authority, for example, and MiCA reports to the authority for crypto-asset issuers. Your authority's website says where each return goes. Spotted something out of date? Write to team@line4.ai.

Questions

What is Line4 Check?

A regulatory filing checker. You choose your country or your framework, then your regulator and return, and Line4 Check runs that regulator's published validation rules on your file, in your web browser, in seconds. It is free to use. Today it covers the EBA reporting framework, used by banks and investment firms in the 30 EU and EEA countries, and Solvency II for insurers, under EIOPA’s rules. We are adding other regulators, starting with the ones people ask for.

Which countries does it cover?

The 30 EU and EEA countries, for EBA returns: the 27 EU Member States, and Iceland, Liechtenstein and Norway. Every other country is listed as coming soon. Choose yours and tell us which regulator and return you need.

Which returns can I check?

EBA reporting framework 4.2, 42 modules: Financial statements (2), Capital, liquidity and large exposures (7), Funding, interest rate risk and other bank returns (7), Resolution, MREL and TLAC (5), Investment firms (4), Remuneration (9), Supervisory benchmarking of internal models (4) and Payment fraud and crypto-assets (4). Each can be an xBRL-CSV report package or an XBRL-XML instance. Filings built for EBA's 4.0, 4.1, 4.2.1, 4.3 and 4.4 (phase 1) releases are checked against their own release's rules, picked from the file's entry point, with the reference date checked against the dates EBA applies that version to. The EBA page lists every module with the number of EBA checks it runs. For insurers, Solvency II QRTs on EIOPA taxonomy 2.8.2 and 2.10.0, in XBRL-XML: the Solvency II page lists each return with the number of EIOPA checks it runs. See every EBA module.

Why do EU and EEA countries share one set of rules?

Supervisory reporting for banks and investment firms is set in EU law. The EBA drafts the reporting standards and publishes the reporting framework that goes with them, with templates, a data point model, an XBRL taxonomy and validation rules, and the European Commission adopts the standards, so they apply directly in every Member State. Iceland, Liechtenstein and Norway apply them through the EEA Agreement. Each national authority collects the returns of the firms it supervises, and some ask for national returns of their own as well.

Is my file uploaded?

No. Your file never leaves your computer. Your browser downloads the Line4 engine and the rules, then opens and checks the file on your own computer. Nothing is uploaded or stored.

Is it free?

Yes. There is no account and no limit on how many filings you check. After a result you can leave your email address to get the report by email, if you want it.

Is this the same as my regulator's validation?

No. It is a check to catch problems before you submit. Your regulator's own validation decides whether a filing is accepted, and it can run checks Line4 Check does not.

When will my regulator be added?

We add regulators one at a time and say so plainly here when one is live. Requests decide what comes next, so choose your country above and tell us which regulator and return you need.

Do you work with regulators?

Yes. Line4 builds SupTech for financial regulators, including collection with validation at the point of submission, so every return is checked the moment it lands. See the platform for regulators. Line4 SupTech platform.