Fatal — invoice rejected TRN & registration Shared Peppol rule PINT-AE 2026.5

How to fix ibr-co-26 in UAE e-invoicing

What is ibr-co-26?

ibr-co-26 is a fatal validation rule in the UAE's Peppol PINT-AE e-invoicing specification, inherited from the shared Peppol layer. It is checked against the seller (supplier) party block and belongs to the TRN & registration rule group. An e-invoice that fails ibr-co-26 is rejected by the Accredited Service Provider gateway before it reaches the FTA.

What the official rule says

In order for the buyer to automatically identify a supplier, the Seller identifier (ibt-029), the Seller legal registration identifier (ibt-030) and/or the Seller Tax identifier (ibt-031) MUST be present.

UAE impact: this is a fatal rule from the shared Peppol layer, enforced in the UAE profile — an invoice failing it is rejected at the Accredited Service Provider gateway before it ever reaches the FTA. A rejected invoice means resubmission delays, and late transmission risks the AED 100-per-invoice penalty under Cabinet Decision No. 106 of 2025.

Where it applies

This rule is checked against the seller (supplier) party block of your UBL 2.1 invoice:

cac:AccountingSupplierParty/cac:Party

Business terms referenced

Term ID	Field	Other rules
IBT-029	Seller identifier	view →
IBT-030	Seller legal registration identifier	view →
IBT-031	Seller VAT Identifier	view →

Field names are derived automatically from the official rule corpus.

Technical test condition (Schematron)

exists(cac:PartyTaxScheme/cbc:CompanyID) or exists(cac:PartyIdentification/cbc:ID) or exists(cac:PartyLegalEntity/cbc:CompanyID)

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Related rules

ibr-012-ae Passport issuing country code (BTAE-18) MUST be there when Seller legal registration identifier type ibr-081 The Seller electronic address (ibt-049) MUST be provided. ibr-150-ae The Seller legal registration identifier (IBT-030) MUST be provided when the scheme identifier (IBT- ibr-172-ae Authority name (BTAE-12) MUST be there when the value in Seller legal registration identifier type ( ibr-173-ae The value in Seller legal registration identifier type [BTAE-15] scheme identifier [IBT-030-1] shoul ibr-177-ae Either Seller tax registration identifier (IBT-032) or Seller VAT identifier (IBT-031) MUST be provi ibr-178-ae Tax scheme code, if provided in (IBT-031-1) shall not be 'VAT' when Seller tax registration identifi ibr-181-ae When scheme identifier (IBT-034-1) is '0235' and Seller legal registration identifier (ibt-030) is p

Rule text sourced from the official OpenPeppol PINT-AE validation artifacts (version 2026.5), refreshed weekly. Explanations are qmetrics' own guidance, not official FTA/MoF text.