What Is a UBL Invoice? UBL 2.1, CIUS and the Dutch SI-UBL Profile
A UBL invoice is an XML document defined by OASIS UBL 2.1. What the standard gives you, what a CIUS narrows, and where Simpler Invoicing (SI-UBL 2.0) fits.
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Germany B2B E-Invoicing 2025–2028: XRechnung & ZUGFeRD
Germany's B2B e-invoicing mandate explained: the 2025 receive obligation, 2027–2028 issue deadlines, and the XRechnung and ZUGFeRD formats you need.
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Invoice Validation Errors You Can Prevent (and How)
The invoice validation errors that cause silent Peppol rejections — and the layered checks that catch them before a document ever leaves your access point.
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Peppol vs PINT: The Difference in E-Invoicing Explained
Peppol vs PINT explained: what BIS Billing 3.0 and PINT actually are, how they differ, when each applies and why it matters for global e-invoicing in 2026.
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