E-invoicing guides
Practical, source-backed answers on EU e-invoice formats, mandates, and validation — no marketing, no fluff.
What is a Leitweg-ID?
A Leitweg-ID (BT-10) is the routing identifier that gets an XRechnung to the right German public office. Its format, where it goes in the invoice, how to get one, and how to fix the BR-DE-15 error.
France e-invoicing 2026: who, when, which format?
France's reform requires all VAT-registered businesses to receive e-invoices from 1 September 2026, then issue them on a staggered timeline. Who's affected, when, and which format (Factur-X).
Quba Viewer alternative: open an e-invoice in your browser
Quba is a free desktop viewer you install. BaseInvoice opens the same XRechnung, ZUGFeRD, Factur-X and UBL files in your browser — no download, nothing uploaded.