eInvoicing

CII

This function can be used to create message syntax which can be exchanged globally between trading partners. It was developed in UN/CEFACT with input from many business organizations.

CIUS-PT

In Portugal, electronic invoicing in public administration known as B2G e-invoicing is similar to existing models in other European countries. The coordinating body for the implementation of e-invoicing in Portugal is Entidade de Serviços Partilhados da Administração Pública (eSPAP).

UBL 2.1 CIUS-PT and CEFACT CIUS-PT are accepted and required as format for electronic signed invoices to public administrations.

Entities that use the Technical Standard UBL2.1 eSPap must transition to the new Technical Standard CIUS-PT. Both standards are expected to coexist in order to ensure the stability of existing processes and accommodate migration.

GS1

In Portugal, tax authorities require resident businesses that offer products or services to government bodies to issue an electronic invoice.

GS1 standards create a common foundation for business by uniquely identifying, accurately capturing, and automatically sharing vital information about products, locations, assets, and more. Businesses can also combine different GS1 standards to streamline business processes such as traceability.