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Overview

E-invoicing is the automated exchange of invoice data between businesses in a structured digital format. Governments require it to prevent tax fraud by tracking transactions in real-time, while businesses benefit from faster payments, fewer errors, and lower processing costs. Instead of sending PDFs or paper invoices that need manual entry, e-invoicing systems automatically validate and process invoice data, making the entire billing cycle more efficient. As more countries make e-invoicing mandatory, it’s becoming the standard way businesses exchange invoices globally.

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Supported E-invoicing jurisdictions

Lago issues compliant documents for invoices, credit notes, and payment receipts for the following jurisdictions:
CountryFormatTypeTechnical standardSupported
🇫🇷 FranceFactur-XEmbedded XML (PDF/A-3 with XML)CII (UN/CEFACT)✅
UBL EN 16931XML onlyUBL 2.1✅
🇩🇪 GermanyXRechnungXML onlyCII or UBL 2.1 (EN 16931)Soon (Q4 2025)
ZUGFeRD 2.xEmbedded XML (PDF/A-3 with XML)CII (UN/CEFACT)Soon (Q4 2025)
🇪🇸 SpainFactura-eXML onlyUBL-basedSoon (Q4 2025)
VeriFactuXML onlyUBL 2.1 or CII (format-agnostic)Soon (Q4 2025)
🇮🇹 ItalyFatturaPAXML onlyProprietary XMLSoon (Q4 2025)
SDI formatXML onlyProprietary XMLSoon (Q4 2025)
🇸🇦 Saudi ArabiaZATCA Standard InvoiceXML onlyUBL 2.1 with ZATCA extensionsSoon (Q4 2025)
ZATCA Simplified InvoiceEmbedded XML (PDF/A-3 with XML)UBL 2.1 with ZATCA extensionsSoon (Q4 2025)

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Activate E-invoicing in Lago

You can enable e-invoicing at the entity level. Each entity can have its own e-invoicing configuration based on its jurisdiction. To activate e-invoicing:
  1. Go to Settings in your Lago dashboard;
  2. Select the entity you want to update;
  3. In the General settings section of this entity, click Edit; and
  4. At the bottom of the form, toggle E-invoicing on.
The E-invoicing toggle appears only if Lago supports e-invoicing for the entity’s country. If the option is not displayed, the country is currently not supported.

Activate E-invoicing for a Lago entity

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Formats and contributions

The output type is typically either an embedded XML file (PDF/A-3 with XML) or a standalone XML, depending on the requirements of each jurisdiction. Lago supports two standard e-invoicing formats: UBL (Universal Business Language) and CII (Cross Industry Invoice). Using Lago’s core templates for these formats, you can extend or customize them to meet the specific requirements of additional jurisdictions. If your jurisdiction is not yet supported and you’d like to contribute to a new format, please contact us. Here is an example of an Cross Industry Invoice (CII) XML file for Factur-X in France: 
<?xml version="1.0" encoding="UTF-8"?>
<rsm:CrossIndustryInvoice xmlns:rsm="urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100"
                          xmlns:qdt="urn:un:unece:uncefact:data:standard:QualifiedDataType:100"
                          xmlns:ram="urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100"
                          xmlns:xs="http://www.w3.org/2001/XMLSchema"
                          xmlns:udt="urn:un:unece:uncefact:data:standard:UnqualifiedDataType:100">
    
    <!-- Exchange Document Context -->
    <rsm:ExchangedDocumentContext>
        <ram:GuidelineSpecifiedDocumentContextParameter>
            <ram:ID>urn:cen.eu:en16931:2017</ram:ID>
        </ram:GuidelineSpecifiedDocumentContextParameter>
    </rsm:ExchangedDocumentContext>
    
    <!-- Exchange Document Header -->
    <rsm:ExchangedDocument>
        <ram:ID>TWI-2684-454-002</ram:ID>
        <ram:TypeCode>386</ram:TypeCode>
        <ram:IssueDateTime>
            <udt:DateTimeString format="102">20250626</udt:DateTimeString>
        </ram:IssueDateTime>
        <ram:IncludedNote>
            <ram:Content>Invoice ID: ffa7f66d-a23d-4559-b048-499be3668c86</ram:Content>
        </ram:IncludedNote>
    </rsm:ExchangedDocument>
    
    <!-- Supply Chain Trade Transaction -->
    <rsm:SupplyChainTradeTransaction>
        
        <!-- Line Item 1: Credit -->
        <ram:IncludedSupplyChainTradeLineItem>
            <ram:AssociatedDocumentLineDocument>
                <ram:LineID>1</ram:LineID>
            </ram:AssociatedDocumentLineDocument>
            <ram:SpecifiedTradeProduct>
                <ram:Name>credit</ram:Name>
                <ram:Description>credit</ram:Description>
            </ram:SpecifiedTradeProduct>
            <ram:SpecifiedLineTradeAgreement>
                <ram:NetPriceProductTradePrice>
                    <ram:ChargeAmount>1.00</ram:ChargeAmount>
                </ram:NetPriceProductTradePrice>
            </ram:SpecifiedLineTradeAgreement>
            <ram:SpecifiedLineTradeDelivery>
                <ram:BilledQuantity unitCode="C62">10.0</ram:BilledQuantity>
            </ram:SpecifiedLineTradeDelivery>
            <ram:SpecifiedLineTradeSettlement>
                <ram:ApplicableTradeTax>
                    <ram:TypeCode>VAT</ram:TypeCode>
                    <ram:CategoryCode>O</ram:CategoryCode>
                </ram:ApplicableTradeTax>
                <ram:SpecifiedTradeSettlementLineMonetarySummation>
                    <ram:LineTotalAmount>10.00</ram:LineTotalAmount>
                </ram:SpecifiedTradeSettlementLineMonetarySummation>
            </ram:SpecifiedLineTradeSettlement>
        </ram:IncludedSupplyChainTradeLineItem>
        
        <!-- Applicable Header Trade Agreement -->
        <ram:ApplicableHeaderTradeAgreement>
            <ram:SellerTradeParty>
                <ram:ID>twilio_eu</ram:ID>
                <ram:Name>Twilio EU</ram:Name>
                <ram:PostalTradeAddress>
                    <ram:PostcodeCode>10001</ram:PostcodeCode>
                    <ram:LineOne>Twilio Europe</ram:LineOne>
                    <ram:CityName>Paris</ram:CityName>
                    <ram:CountryID>FR</ram:CountryID>
                </ram:PostalTradeAddress>
            </ram:SellerTradeParty>
            <ram:BuyerTradeParty>
                <ram:Name>Decathlon France</ram:Name>
                <ram:PostalTradeAddress>
                    <ram:PostcodeCode>75011</ram:PostcodeCode>
                    <ram:LineOne>100 rue decathlon</ram:LineOne>
                    <ram:LineTwo>Batiment D</ram:LineTwo>
                    <ram:CityName>Paris</ram:CityName>
                    <ram:CountryID>FR</ram:CountryID>
                </ram:PostalTradeAddress>
            </ram:BuyerTradeParty>
        </ram:ApplicableHeaderTradeAgreement>
        
        <!-- Applicable Header Trade Delivery -->
        <ram:ApplicableHeaderTradeDelivery>
            <ram:ActualDeliverySupplyChainEvent>
                <ram:OccurrenceDateTime>
                    <udt:DateTimeString format="102">20250527</udt:DateTimeString>
                </ram:OccurrenceDateTime>
            </ram:ActualDeliverySupplyChainEvent>
        </ram:ApplicableHeaderTradeDelivery>
        
        <!-- Applicable Header Trade Settlement -->
        <ram:ApplicableHeaderTradeSettlement>
            <ram:InvoiceCurrencyCode>USD</ram:InvoiceCurrencyCode>
            
            <!-- Payment Means -->
            <ram:SpecifiedTradeSettlementPaymentMeans>
                <ram:TypeCode>30</ram:TypeCode>
                <ram:Information>Credit transfer</ram:Information>
            </ram:SpecifiedTradeSettlementPaymentMeans>
            
            <!-- Tax Information - Not applicable for prepaid credit -->
            <ram:ApplicableTradeTax>
                <ram:CalculatedAmount>0.00</ram:CalculatedAmount>
                <ram:TypeCode>VAT</ram:TypeCode>
                <ram:BasisAmount>10.00</ram:BasisAmount>
                <ram:CategoryCode>O</ram:CategoryCode>
                <ram:ExemptionReasonCode>VATEX-EU-O</ram:ExemptionReasonCode>
            </ram:ApplicableTradeTax>
            
            <!-- Payment Terms -->
            <ram:SpecifiedTradePaymentTerms>
                <ram:Description>Net payment term: 0 days</ram:Description>
                <ram:DueDateDateTime>
                    <udt:DateTimeString format="102">20250626</udt:DateTimeString>
                </ram:DueDateDateTime>
            </ram:SpecifiedTradePaymentTerms>
            
            <!-- Monetary Summation -->
            <ram:SpecifiedTradeSettlementHeaderMonetarySummation>
                <ram:LineTotalAmount>10.00</ram:LineTotalAmount>
                <ram:ChargeTotalAmount>0.00</ram:ChargeTotalAmount>
                <ram:AllowanceTotalAmount>0.00</ram:AllowanceTotalAmount>
                <ram:TaxBasisTotalAmount>10.00</ram:TaxBasisTotalAmount>
                <ram:TaxTotalAmount currencyID="USD">0.00</ram:TaxTotalAmount>
                <ram:GrandTotalAmount>10.00</ram:GrandTotalAmount>
                <ram:TotalPrepaidAmount>0.00</ram:TotalPrepaidAmount>
                <ram:DuePayableAmount>10.00</ram:DuePayableAmount>
            </ram:SpecifiedTradeSettlementHeaderMonetarySummation>
        </ram:ApplicableHeaderTradeSettlement>
        
    </rsm:SupplyChainTradeTransaction>
    
</rsm:CrossIndustryInvoice>
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