ErrorBR-CO-15
The invoice total with VAT (BT-112) should be the total without VAT 1500.00 plus the VAT 0.00, that is 1500.00. The file says 1500.01. Correct the total in the invoice header, not the individual lines.
Check and create Peppol e-invoices. Find the errors before your customer does.
Drop in a UBL file and see at once which EN 16931, Peppol or XRechnung rule it breaks, and where. Free, no account, and the file never leaves your browser.
Drop the XML file hereor click and pick it from your computer
Check an e-invoice
ExampleWe found 2 errors. Fix them and check again.
ErrorARL-IBAN
The IBAN "IE29AIBK93115212345671" fails the mod 97 check under ISO 13616. Check the account number for a typo.
The check and the preview stay free. You only pay for downloading the XML of one invoice that you create here in the form: 2.90 € excl. VAT (3.57 € incl. 23 % VAT in Slovakia); the checkout shows the total for your country.
Example: our sample invoice with two errors we put in on purpose. Load a file and your own result appears here.
The same XML file, read as an ordinary invoice: who billed whom, for what, when, how much and where to pay. Useful when a file arrives from a supplier and you have to read it without accounting software. The button below saves it as a PDF in A4.
Preview an e-invoice as a document
Load a file and the document will be drawn here.
Create an e-invoice without accounting software
Fill in the seller, the buyer, the numbers and the lines. On the right the document builds itself, and the UBL 2.1 XML with it. Seller and buyer can be kept in an address book that never leaves your browser. Before the download we run the same check over the generated XML as in the first tab; if it has an error, we do not hand it to you.
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Document preview
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The form and the preview are free. The finished XML is paid: 2.90 € excl. VAT for one invoice (unlocked in this browser for 24 hours, so you can correct it and download again) or 9.90 € excl. VAT for 30 days with no limit on the number of invoices. The XML is made in your browser and is never sent to a server, so we never see it. We send you no e-mail; the receipt comes from Stripe, and after the payment you get a link here that reopens the unlocked download in another browser.
The checkout adds VAT where it applies to 2.90 € or 9.90 €, for example 3.57 € or 12.18 € with 23 % VAT in Slovakia, and shows the final total before you pay.
The seller (merchant of record) is Link (Sold through Link, LLC) through the Stripe Managed Payments service; ARLing s. r. o. supplies the product. At checkout you will see “Sold through Link”, your bank statement will show LINK.COM* ARLING, and Link sends you the receipt. As a consumer you can withdraw within 14 days without giving a reason (our terms, section 5). Terms · Withdrawal
- 0 € check and preview, no account
- 2.90 € excl. VAT (3.57 € incl. 23 % VAT in Slovakia) the XML of one invoice
- 9.90 € excl. VAT (12.18 € incl. 23 % VAT in Slovakia) 30 days, no limit
332 rule codes from the official schematron files
EN 16931, XRechnung 3.0, Peppol BIS Billing 3.0, UBL 2.1, Invoice, CreditNote, BR-01 to BR-65, BR-CO, BR-DEC, BR-CL, BR-DE-1 to BR-DE-31, Leitweg-ID, IBAN mod 97, CustomizationID
Three steps, nothing to install.
Load the file
Drop the XML from your invoicing software, pick it from your computer or paste the text. We read UBL 2.1, invoices and credit notes alike. A CII file we recognise and tell you so, but we do not run the rules on it.
Read the errors, explained
Every finding gives you the rule code, a sentence in plain English, the value from the file, the path to the element and the original wording of the rule. The CustomizationID field tells us whether EN 16931, Peppol BIS Billing 3.0 or XRechnung applies.
Error
BR-CO-15The invoice total with VAT (BT-112) should be the total without VAT 1500.00 plus the VAT 0.00, that is 1500.00. The file says 1500.01. Correct the total in the invoice header, not the individual lines.
Original wording of the rule
[BR-CO-15]-Invoice total amount with VAT (BT-112) = Invoice total amount without VAT (BT-109) + Invoice total VAT amount (BT-110).
Save the report or buy the XML
The check report and the document preview, PDF included, are free. You pay only for the XML of an invoice you build in the form here: 2.90 € excl. VAT for one, or 9.90 € excl. VAT for 30 days. The same check runs over it before the download.
Who it is for, and from when.
For Slovak businesses. You can arrange free receipt of e-invoices with a provider; check the terms and limits of its plan. Issue invoices through your accounting software or provider. Our XML check and preview are free.
Use the official list of certified providers and intermediaries. For example, KROS lists free receipt and eFaktura.sk has a free issuing plan. Sources checked on 29 September 2026; verify availability and limits before registering. Our tool does not deliver invoices through Peppol.
- Germanysince 1 January 2025
Businesses must be able to receive B2B e-invoices. Sending is staged: companies with a previous year turnover of up to 800 000 euro have until 31 December 2027, and everyone must send from 1 January 2028. You can check and build XRechnung 3.x here, Leitweg-ID field included.
- PeppolPeppol BIS Billing 3.0
You hand the invoice to your access point provider, who delivers it to the buyer. Here you check it first, or build it, in the Peppol BIS Billing 3.0 profile. Delivery into the Peppol network is not included.
- Slovakiafrom 1 January 2027
From 1 January 2027, the issuing obligation for Slovak VAT payers follows section 85o(2) of the VAT Act, inserted by Act 385/2025 Coll. Slovak businesses that are not VAT payers must also be able to receive e-invoices.
The invoice file is read, checked and drawn in your browser. It is never sent to our server.
Stays in your browser
- Reading the file. The XML opens right in the browser and is never uploaded.
- Rule check and preview. All 332 rule codes and the drawing of the document run on your machine.
- Building XML and PDF. The XML is made from the form in your browser; the PDF is saved by the print function of your browser.
- Address book and draft. Kept only in this browser; one button in the form erases them.
Goes to a server
- Payment check. When you come back from Stripe, the page asks our server, by the checkout session number, whether the payment went through. The invoice is not sent along.
- Payment. Happens on the Stripe page. The seller (merchant of record) is Link (Sold through Link, LLC) through the Stripe Managed Payments service; ARLing s. r. o. supplies the product.
- Optional enquiry. Sends only what you type into it.
- Visit counting. Our own Umami counts visits and events, for example that a check ran and how it ended. The contents of the invoice never go into it.
The invoice file and the details in the invoice creation form stay in your browser. The address book for sellers and buyers sits in localStorage and can be cleared with the button in that form. After a payment, we check its status on the server. A separate optional enquiry sends ARLing only what you enter in it; the invoice is not automatically attached. We measure visits with our own Umami.
You pay only for the finished XML.
Check and preview
No account, no limit, with the check report and the document as a PDF.
0 €
Check a fileXML of one invoice
The download stays unlocked in this browser for 24 hours, so you can correct the invoice and download it again.
2.90 € excl. VAT3.57 € incl. 23 % VAT in Slovakia, other countries at checkout
Create an invoice30 days, no limit
Any number of invoices, including a CSV batch in one ZIP. One-time payment, no subscription.
9.90 € excl. VAT12.18 € incl. 23 % VAT in Slovakia, other countries at checkout
Batch from CSV
Prices exclude VAT. The Stripe checkout adds VAT where it applies, by the buyer’s country, for example 23 % in Slovakia (one invoice 3.57 €, 30 days 12.18 €) or 19 % in Germany (3.45 €, 11.78 €), and shows the final total before payment.
Provider: ARLing s. r. o., company ID 56583486, Bratislava, Slovakia. Stripe handles the payment.
An honest list, not a promise of completeness.
We check 332 rule codes, each explained on its own page. That covers the core rules of EN 16931 (BR-01 to BR-65), the total rules BR-CO, the decimal rules BR-DEC, the code list rules BR-CL, the rules per VAT category (S, Z, E, AE, K, G, O, L, M), the rules of Peppol BIS Billing 3.0 including the check digits of national identifiers, the rules of XRechnung 3.x (BR-DE-1 to BR-DE-31), and thirteen checks of our own: IBAN by mod 97, the shape of German, Slovak, Czech and Austrian VAT numbers, the format of the German Leitweg-ID, the order of dates and the currency code.
We do not check the UBL 2.1 XSD schema, so neither element order nor data types. We do not check the 755 rules in the UBL-CR, UBL-SR and UBL-DT groups, which mostly point at elements that should not be there. We apply no rules over the CII syntax: such a file we recognise and say so. Passing our check therefore does not guarantee that the buyer, the buyer invoicing system or the Peppol network will accept the invoice. It is a good first check, not the last word.
The rule wordings come from the official schematron files: EN 16931 from ConnectingEurope, Peppol BIS Billing 3.0 from OpenPEPPOL and XRechnung from KoSIT. Rule codes and rule texts are normative, so we quote them alongside the rule code and write our own explanation of what to fix.
- EN 16931 and its schematron: github.com/ConnectingEurope/eInvoicing-EN16931
- Peppol BIS Billing 3.0, including the EAS and ICD code lists: docs.peppol.eu
- XRechnung, the German CIUS, by KoSIT: xeinkauf.de
- Germany, the federal finance ministry on e-invoicing from 1 January 2025: bundesfinanzministerium.de
- Slovakia, Act 385/2025 Coll. (section 85o(2): issuing obligation from 1 January 2027; section 76a: delivery service): slov-lex.sk
What people ask.
No answer here? Write to support@arling.sk.
What is an e-invoice?
An e-invoice is an invoice issued, sent and received in a structured format that a computer can process without anyone retyping it. A PDF sent by e-mail is not an e-invoice. The format is set by the European standard EN 16931 and its two syntaxes: OASIS UBL 2.1 and UN/CEFACT CII.
Is EN 16931 only a European thing?
EN 16931 is a European standard, published by CEN. The delivery network built on top of it, Peppol, is used across the European Union and by a growing number of countries outside Europe; the official Peppol code lists carry national identifier schemes from outside Europe as well. If your customer asks for a Peppol BIS Billing 3.0 invoice, this page checks and builds exactly that, wherever you are.
Who has to do this and from when?
In Germany, businesses have had to be able to receive B2B e-invoices since 1 January 2025; sending is staged, with companies whose previous year turnover was up to 800 000 euro getting until 31 December 2027 and everyone having to send from 1 January 2028. From 1 January 2027, Slovak VAT payers under sections 4, 4b or 4c must issue e-invoices for domestic supplies to businesses, subject to statutory exceptions (section 85o(2) of the VAT Act, inserted by Act 385/2025 Coll.). Businesses that are not VAT payers must also be able to receive them. Elsewhere the dates differ, so check your own country; the format and the network are the same.
UBL or CII, which should I pick?
Both syntaxes are equal under EN 16931. In practice the Peppol network carries UBL 2.1, so that is what we generate. CII is used mostly in Germany, including inside the hybrid PDF format ZUGFeRD. Our checker applies the rules over UBL only; a CII file we recognise and tell you so, but we do not run the rules on it.
What is Peppol and how does the invoice travel?
Peppol is a network for exchanging electronic business documents. You do not send the invoice to the buyer directly: you hand it to your access point provider, that provider passes it to the buyer provider, and the buyer provider delivers it. Every party has an electronic address made of a scheme code and an identifier, for example a GS1 GLN with schemeID 0088, a German VAT number with 9930, or a Slovak tax number DIC with 0245. Codes for other countries are in the CEF EAS code list on docs.peppol.eu; we do not guess them.
What does CustomizationID mean?
CustomizationID is field BT-24 and says which specification the invoice follows. It decides which rules apply. For Peppol BIS Billing 3.0 the value is urn:cen.eu:en16931:2017#compliant#urn:fdc:peppol.eu:2017:poacc:billing:3.0; for XRechnung 3.0, the German national specification, it ends with xrechnung_3.0. Our checker reads this field and picks the rule set by itself.
Why does the checker report BR-CO-15?
BR-CO-15 requires the invoice total with VAT (BT-112) to equal the total without VAT (BT-109) plus the total VAT amount (BT-110). It is usually a single cent: your software computes VAT line by line and rounds, while the standard wants one VAT amount per rate, computed from the whole taxable amount. Correct the total in the invoice header, not the individual lines.
How do I get a receipt, and can I get a refund?
The seller (merchant of record) is Link (Sold through Link, LLC) through the Stripe Managed Payments service; ARLing s. r. o. supplies the product. Link e-mails you the receipt and the invoice. As a consumer you can withdraw within 14 days without giving a reason (our terms, section 5). If the tool does not work for you, write to support@arling.sk; I answer personally, usually within 24 hours.
A template and a check, not tax advice.
This tool checks the shape of the file and assembles a UBL 2.1 invoice from what you type. It does not judge whether you should charge VAT, which rate applies to a supply, whether the reverse charge applies, or whether the supply is taxable at all. That is tax advice, and that is what an accountant or a tax adviser is for. Whoever issues the invoice is responsible for it being right.
We offer VAT rates only for the countries we verified at an official source. For any other country the generator asks you to type the rate yourself rather than guessing it for you.
When a law, a schematron or a version of the specification changes, we adjust the rules and write it here with a date. The facts on this page we verified at the official sources listed above on 11 September 2026.
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