Validation
14 articles on Validation and UK e-invoicing.
- Accounts receivable e-invoicing in the UK: send and get paidHow UK accounts receivable teams should prepare to send Peppol e-invoices by April 2029: customer data, validation, rejections, credit notes and cash flow.Guide · 5 min
- Common Peppol validation errors explained (with fixes)The Peppol BIS Billing 3.0 validation errors UK senders hit most, with the exact rule text, why each one fires and how to fix it in the UBL.Guide · 7 min
- E-invoice credit notes in the UK: how they work in PeppolHow to issue a UK credit note as a Peppol e-invoice: credit note vs negative invoice, type code 381, the original invoice reference and a valid UBL example.Guide · 6 min
- Reverse charge construction e-invoices in Peppol (AE code)How to issue a UK construction domestic reverse charge invoice in Peppol: the AE code, HMRC's wording rules, a valid UBL example and the BR-AE errors to avoid.Guide · 6 min
- UK Peppol invoice XML example (UBL, validated)A complete UK Peppol BIS Billing 3.0 invoice in UBL XML, with GBP, 20% and zero-rated lines and a delivery charge, validated against EN 16931 and Peppol rules.Guide · 5 min
- How to attach a PDF to a Peppol invoice (BG-24)How to attach a PDF, timesheet or spreadsheet to a Peppol e-invoice: allowed file types, the exact UBL, and the rules that reject attachments.Guide · 5 min
- Master data clean-up for e-invoicing: VAT numbers and moreHow to clean customer and supplier master data for UK e-invoicing: VAT numbers, legal names, Peppol IDs, VAT codes and references, with a practical checklist.Guide · 5 min
- Foreign currency VAT invoices as e-invoices: showing VAT in GBPYou can invoice in euros or dollars, but HMRC wants total VAT in sterling. How to do that in a Peppol e-invoice with BT-6 and BT-111, and errors to avoid.Guide · 5 min
- Peppol BIS Billing 3.0: a guide for UK businessesPeppol BIS Billing 3.0 is the invoice and credit note format used on Peppol. What it contains, the rules UK invoices trip on, current versions and UK unknowns.Guide · 5 min
- Peppol scheme 9932 and 0088: EAS codes for UK businesses9932 is the Peppol scheme code for a UK VAT number and 0088 is a GS1 Global Location Number. How each is used, where it goes in the invoice and what to avoid.Guide · 5 min
- Peppol Invoice Response vs MLR and MLS explainedMLR and its successor MLS tell the sender's provider if an invoice was delivered or rejected; Invoice Response tells the supplier what the buyer did with it.Explainer · 5 min
- BR-CO-15 error: Invoice total amount with VAT explained and fixedBR-CO-15 fires when BT-112 does not equal BT-109 plus BT-110, or the UBL has more than one VAT total in the invoice currency. Causes, tests and fixes with UBL.Guide · 5 min
- Buyer reference (BT-10) and PO number in Peppol invoicesPeppol invoices need a buyer reference (BT-10) or a PO reference (BT-13) or rule PEPPOL-EN16931-R003 rejects them. What each is for and how to fill it.Guide · 5 min
- UK VAT category codes in Peppol: S, Z, E, AE and O explainedWhich Peppol VAT category code to use for UK standard, reduced, zero-rated, exempt, outside-scope and reverse charge supplies, and the rules each triggers.Guide · 6 min