Reference directory
UAE VAT & TRN reference
The structural facts every UAE e-invoice must get right — pulled live from the official PINT-AE validation rules, not from a blog post that quietly went stale.
TRN format
What a valid 15-digit UAE Tax Registration Number looks like, per the official validation rule — with compliant and rejected XML.
VAT category codes
S, Z, E, O and AE — what each category means, what the invoice must show, and every official rule that applies to it.
Invoice types
Standard (B2B) vs simplified (B2C) tax invoices — which buyer identification rules apply to each.
Kept current programmatically: this page is generated from the official
OpenPeppol PINT-AE validation artifacts (version 2026.5),
re-synced automatically every week — last sync 05 Aug 2026.
Rule text below is the official wording, not a paraphrase.