E-Invoice Error Reference
1375+ documented errors for Peppol, UBL, CII, and EN16931 validation errors.
345 errors found · Page 6 of 7 in Business Rules
BR-63EN 16931INPUTBuyer electronic address is missing its scheme identifier
Your invoice includes a buyer electronic address (EndpointID), but it does not specify what type of identifier it is. The scheme identifier tells the receiving system whether the address is a GLN number, a VAT number, a chamber of commerce number, or another type. Without it, the Peppol network cannot route the invoice to the correct recipient.
BR-CL-16EN 16931AUTO-FIXInvalid payment means code
The payment means code must be a valid code from the UNTDID 4461 code list. Common codes: 10 (Cash), 30 (Credit transfer), 48 (Bank card), 49 (Direct debit), 58 (SEPA credit transfer), 59 (SEPA direct debit).
BR-01EN 16931AUTO-FIXInvoice must have specification identifier
Every Peppol BIS invoice must include a specification identifier (CustomizationID) that indicates which profile the invoice conforms to.
BR-35peppol-bis-3INPUTCredit note must reference original invoice
Credit notes should reference the original invoice being credited.
BR-39peppol-bis-3INPUTItem identifier recommended
Line items should have an item identifier for matching and processing.
BR-40peppol-bis-3INPUTNote text should be meaningful
Invoice notes should provide useful information in an appropriate language.
BR-58en16931INPUTDocument charge must have reason
Document level charge must have reason code or text.
BR-59en16931INPUTAllowance base amount required when percentage used
If allowance/charge has percentage, base amount is mandatory.
BR-60en16931INPUTItem classification must have valid scheme
Commodity classification must have valid scheme identifier.
PEPPOL-INV-ITEM-IDPeppol BIS 3.0BLOCKEDItem identification SHOULD be provided for better interoperability
Item identification SHOULD be provided for better interoperability. This applies to the `cbc:ID` element in the invoice XML.
SE-R-003Peppol BIS 3.0AUTO-FIXSwedish organisation numbers should be numeric.
Swedish organization numbers must contain only numeric characters. No letters or special characters allowed.
BR-Z-02EN 16931INPUTWhen using this VAT category, the seller must have a VAT identifier, tax...
When using this VAT category, the seller must have a VAT identifier, tax registration, or tax representative (applies to `cac:InvoiceLine`, rule BR-Z-02).
BR-CO-25EN 16931INPUTPayment due date or payment terms required when amount due is positive
BR-CO-25 fires when the Amount due for payment (BT-115) is greater than zero but neither the Payment due date (BT-9, cbc:DueDate) nor the Payment terms (BT-20, cac:PaymentTerms/cbc:Note) is present. Peppol requires the buyer to know when to pay or under what terms — a positive amount with no payment timing is a fatal validation error.
BR-IC-05EN 16931CONFIRMIntra-community supply invoice line must have a VAT rate of zero
BR-IC-05 fires when an invoice line (BG-25) whose invoiced item VAT category code (BT-151) is 'Intra-community supply' (code K) carries an invoiced item VAT rate (BT-152) other than 0. Intra-community B2B supplies are reverse-charged to the customer, so the seller must show a 0 rate. It is the category-K member of the EN 16931 line-rate family (BR-S-05, BR-Z-05, BR-E-05, BR-AE-05, BR-G-05, BR-O-05).
BR-O-10EN 16931AUTO-FIXThis VAT category requires an exemption reason code or text explaining why...
This VAT category requires an exemption reason code or text explaining why no tax is charged (applies to `cac:TaxSubtotal`, rule BR-O-10).
BR-CL-01EN 16931AUTO-FIXInvalid invoice type code
The invoice type code is not a valid value from the UN/EDIFACT code list 1001. Valid codes include 380 for a standard invoice, 381 for a credit note, 383 for a debit note, 384 for a corrected invoice, 386 for a prepayment invoice, and 389 for a self-billed invoice.
BR-03EN 16931AUTO-FIXInvoice must have an issue date
Every invoice must contain an issue date indicating when the invoice was created.
DE-R-014DEUEN 16931AUTO-FIXThe element "VAT category rate" (BT-119) shall be provided.
The element VAT category rate (BT-119) shall be provided.. This applies to the `cbc:Percent` element in the invoice XML.
BR-S-01EN 16931BLOCKEDStandard rate must be in VAT breakdown
If any line uses VAT category S, VAT breakdown must include S category.
BR-S-02EN 16931INPUTStandard rated invoice requires seller VAT number
This invoice charges standard-rate VAT but does not include the seller's VAT identification number. When an invoice includes items at a standard VAT rate, the seller must provide their VAT ID, tax registration number, or a tax representative's VAT ID.
BR-CO-16EN 16931AUTO-FIXPayable amount calculation error
Amount due for payment (BT-115) = Invoice total amount with VAT (BT-112) - Paid amount (BT-113) + Rounding amount (BT-114).. This applies to the `cbc:PayableAmount` element in the invoice XML.
BR-61EN 16931BLOCKEDIf the Payment means type code (BT-81) means SEPA credit transfer, the...
If the Payment means type code (BT-81) means SEPA credit transfer, the Payment account identifier (BT-84) shall be an IBAN.. This applies to the `cbc:PaymentMeansCode` element in the invoice XML.
BR-25EN 16931INPUTInvoice line item name required
Each Invoice line shall contain the Item name (BT-153). This describes the goods or services being invoiced.
BR-CL-23EN 16931AUTO-FIXUnit code MUST be coded according to the UN/ECE Recommendation 20 with Rec...
A Unit of Measure Code is not a valid UN/ECE Rec 20/21 code. Common codes: C62=unit, HUR=hour, KGM=kilogram, MTR=meter.
BR-O-02EN 16931AUTO-FIXVAT identifier found but invoice is marked as not subject to VAT
Your invoice uses VAT category "O" (Not subject to VAT) on one or more lines, but the seller has a VAT identification number. These two things contradict each other — if VAT does not apply, the seller should not have a VAT ID on this invoice.
BR-S-05EN 16931INPUTStandard rate taxable amount calculation
VAT category S taxable amount must equal sum of S-rated amounts.
PEPPOL-EN16931-R043Peppol BIS 3.0AUTO-FIXAllowance/charge ChargeIndicator value MUST equal "true" or "false"
The ChargeIndicator on one of your discounts or surcharges is not in the correct format. It must be exactly "true" (for a surcharge) or "false" (for a discount), in lowercase.
IN-PAYMENT-MEANS-CODESPeppol BIS 3.0BLOCKEDPayment means codes validation
Payment means codes should be from recommended UNCL4461 subset
BR-E-10EN 16931AUTO-FIXThis VAT category requires an exemption reason code or text explaining why...
This VAT category requires an exemption reason code or text explaining why no tax is charged.
BR-06EN 16931INPUTInvoice must have seller name
An Invoice shall contain the Seller name (BT-27). This is the trading name or legal name of the seller/supplier.
BR-16EN 16931BLOCKEDInvoice line must have an identifier
Each invoice line must have a unique line identifier (ID).
UBL-SR-47EN 16931AUTO-FIXMultiple different payment methods on one invoice
Your invoice has multiple payment means sections with different payment method codes. The UBL standard requires that all payment means on a single invoice use the same payment method code.
BR-CL-04EN 16931AUTO-FIXInvalid currency code
Currency code must be a valid ISO 4217 alpha-3 code (e.g., EUR, USD, GBP). Ensure you are using the three-letter currency code, not a currency symbol or name.
PEPPOL-COMMON-R046Peppol BIS 3.0AUTO-FIXTax Code (Codice Fiscale) must be stated in the correct format
Italian Tax Code (Codice Fiscale) must follow the correct format. This validation applies to a different location in the invoice where tax codes appear.
PEPPOL-COMMON-R044Peppol BIS 3.0AUTO-FIXItalian office code (IPA) has wrong format
The Italian IPA code (Codice Univoco Unità Organizzativa) on your invoice is not in the correct format. It must be exactly 6 uppercase letters and/or digits.
BR-23EN 16931AUTO-FIXMissing unit of measure code
Each Invoice line shall have an Invoiced quantity unit of measure code (BT-130). This identifies the unit of measure for the invoiced quantity using UN/ECE Recommendation 20 codes.
PEPPOL-EN16931-R008Peppol BIS 3.0AUTO-FIXDocument MUST not contain empty elements.
The document must not contain empty XML elements. All elements that are present must have content - empty tags are not allowed in PEPPOL invoices.
BR-30EN 16931AUTO-FIXInvoice line period end date before start date
If both Invoice line period start date (BT-134) and Invoice line period end date (BT-135) are given then the end date shall be later or equal to the start date.
BR-CL-25EN 16931AUTO-FIXUnit of measure codes MUST be coded according to UN/ECE Recommendation 20.
The scheme identifier for a seller or buyer electronic address (endpoint) is not from the valid Electronic Address Scheme (EAS) code list. Every endpoint ID must specify which numbering system it uses, such as 0088 for GLN, 0007 for Swedish org number, or 0198 for Danish CVR.
BR-51EN 16931AUTO-FIXPayment card primary account number not masked
The invoice contains a full credit card number (BT-87), which violates PCI security standards. Only the first 6 and last 4 digits should be shown.
UBL-SR-12EN 16931AUTO-FIXSeller VAT identifier shall occur maximum once
Your invoice contains multiple Seller VAT identifiers (PartyTaxScheme with VAT scheme). EN16931 allows only one VAT identifier per seller.
PEPPOL-COMMON-R049Peppol BIS 3.0AUTO-FIXInvalid Swedish organization number
A Swedish organization number (organisationsnummer) in this invoice is not correctly formatted. Swedish org numbers must be exactly 10 digits and include a valid check digit calculated using the Luhn algorithm. This applies to any identifier using scheme 0007, including seller and buyer endpoint addresses, company registration numbers, and party identifiers.
BR-CO-18EN 16931INPUTAn Invoice shall at least have one VAT breakdown group (BG-23)
An Invoice shall at least have one VAT breakdown group (BG-23). This applies to the `cac:TaxSubtotal` element in the invoice XML.
BR-05EN 16931AUTO-FIXMissing document currency code
An Invoice shall have an Invoice currency code (BT-5). This specifies the currency used for all monetary amounts in the invoice using ISO 4217 three-letter codes.
BR-42EN 16931AUTO-FIXInvoice line allowance reason required
An invoice line allowance (BG-27) is missing both a reason text (BT-139) and reason code (BT-140). At least one must be provided to explain this line discount.
KSEF-21115PLksefINPUTKSeF error 21115 — invalid authentication certificate
KSEF-21115 ("Nieprawidłowy certyfikat" / invalid certificate) is a gateway error returned during authentication, before any invoice is processed. The KSeF 2.0 API rejected the certificate presented to establish the session, so the connection is never authorised and no document reaches schema or business validation. It is an integration/credential problem, not a fault in the invoice XML — the same certificate fails for every document until it is corrected.
BR-AG-05EN 16931AUTO-FIXIPSI invoice line VAT rate must be 0% or positive
When an invoice line uses the IPSI VAT category (M for Ceuta/Melilla indirect tax), the VAT rate must be 0 or greater than zero.
PEPPOL-EN16931-R101Peppol BIS 3.0AUTO-FIXInvoice line document reference has wrong type code
A document reference on one of your invoice lines uses the wrong type code. Line-level document references in Peppol invoices must use code "130", which means "invoice line object identifier".
BR-CL-13EN 16931AUTO-FIXInvalid product classification scheme
A line item's classification code uses an invalid scheme identifier. The classification listID must be from the UNTDID 7143 code list. Common valid schemes include STI for UNSPSC, EN for eCl@ss, and CPV for EU public procurement.
PEPPOL-COMMON-R041Peppol BIS 3.0AUTO-FIXNorwegian organization number MUST be stated in the correct format.
Norwegian organization numbers must follow the correct format. The organization number is a 9-digit identifier assigned by Brønnøysund Register Centre.
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