Brazil Introduces PAA Framework for Delegated NF‑e Issuance

• On 22 April 2026, Brazil published Technical Note (NT) 2026.001 v.1.00, formally introducing the PAA (Provedores de Assinatura e Autorização) model for issuing electronic invoices (NF‑e).
• PAAs are authorised to build, digitally sign, and submit NF‑e on behalf of taxpayers to SEFAZ, but only via the SVRS (Sefaz Virtual do Rio Grande do Sul) environment.
• The model introduces strict technical and cryptographic controls, including a new infPAA XML block, dual signature requirements, restricted invoice series, and dedicated rejection codes.

Source gov.br

Article

On 22 April 2026, Brazil took a significant step in the evolution of its e‑invoicing framework with the publication of Technical Note 2026.001 v.1.00, which formally establishes the PAA (Provedor de Assinatura e Autorização) operating model for the issuance of Nota Fiscal eletrônica (NF‑e). This development enhances flexibility for taxpayers while preserving Brazil’s long‑standing clearance and control architecture.

What is the PAA model?

Under the new framework, PAAs are authorised third‑party providers that may prepare, digitally sign, and submit NF‑e to the tax authorities on behalf of taxpayers. Unlike traditional NF‑e issuance, where invoices are generated and signed directly by the taxpayer, the PAA model allows delegated issuance within a tightly regulated technical perimeter.

The Technical Note makes clear that PAAs do not replace SEFAZ’s clearance role. All invoices issued under the PAA model remain subject to real‑time authorisation by SEFAZ, ensuring continuity with Brazil’s clearance‑based VAT control system.

Key technical features introduced

The Technical Note defines a number of new mandatory technical elements for NF‑e issued under the PAA model:

• A new infPAA block is added to the NF‑e XML, identifying the PAA involved in the issuance process.
• Dual signature requirements apply:
  • a cryptographic RSA signature over the NF‑e Id, ensuring integrity of the invoice identifier, and
  • a digital certificate issued under ICP‑Brasil, applied to the XML document, preserving fiscal and legal authenticity.

These layered signatures reinforce trust in delegated issuance while maintaining cryptographic traceability between the taxpayer, the PAA, and SEFAZ.

Operational scope and restrictions

The use of PAAs is deliberately limited in scope:

• NF‑e issued via a PAA must use series 970 to 979 exclusively.
• PAA‑issued NF‑e may be submitted only via SVRS, even if the taxpayer is normally connected to another SEFAZ authorisation environment.

These constraints ensure that PAA activity is clearly segregated from standard taxpayer‑issued NF‑e and can be centrally supervised by the tax authorities.

Validation rules and controls

NT 2026.001 v.1.00 also introduces strict validation logic, including:

• mandatory prior registration of the PAA with the tax authorities,
• explicit linkage between the taxpayer and the authorised PAA,
• verification of cryptographic elements and certificate validity, and
• a dedicated set of rejection codes applicable only to PAA‑issued invoices.

Failure to comply with any of these conditions results in immediate rejection of the NF‑e during the authorisation process.

Why this matters

The formalisation of the PAA model reflects Brazil’s effort to modernise NF‑e issuance while safeguarding fiscal control. It enables new operating models—such as platform‑based invoicing, shared services, or outsourced issuance—without weakening SEFAZ’s real‑time visibility over taxable transactions.

For taxpayers and solution providers, however, the model introduces additional governance, onboarding, and technical complexity. ERP systems, middleware platforms, and tax engines must be adapted to handle:

• delegated issuance logic,
• additional XML structures,
• dual digital signatures, and
• differentiated business rules for PAA versus non‑PAA scenarios.

The full Technical Note 2026.001 v.1.00 is available on the official NF‑e portal and constitutes the authoritative specification for implementing the PAA model in Brazil.