Best way to do Extensibility for Digital Signature in Public for Angola

[carlosrusso]

Hi all.

Angola uses digital signatures, and even though it is not a country localized by SAP, it has a special license from SAP for ECC and S/4 HANA, for SAFT and digital signatures.  This special licensing does not exist for SAP Public Cloud. 

How can we do this using the extensibility options in SAP Public Cloud? 

We possess some knowledge regarding the extensibility of the DRC-eDocument feature in SAP Public Cloud.  We don’t need to communicate with the local tax authority. We need to develop or consume a certification engine to sign billing or delivery documents. It is essential to validate the certification engine with the local tax authority, but this step can be done in the second task.

Although we are unaware of Public's full extensibility capabilities, the e-documents framework appears capable of meeting this need.

The integration between the e-document framework and accounting in FICO is critical. If an invoice in SAP ECC or S/4, is not signed, the accounting document is not created. The idea is to build or consume a certification engine, develop all the rules using the e-documents flow/framework, and then include the signing step in the billing app.

We welcome comments and suggestions for alternative approaches.

Thank you.

Best regards

Carlos Russo

[Chuma]

Dear Carlos,

Thank you for the detailed explanation.

While SAP S/4HANA Public Cloud does not offer native support for Angola, your approach using the extensibility of the DRC eDocument Framework is feasible. You can build a custom communication scenario via the Document Compliance (DRC) extensibility options to integrate a certification engine for digital signing before the accounting document is posted.

The critical step will be inserting the signing logic in the eDocument processing flow, ideally through BAdIs, custom logic, or a side-by-side extension via SAP BTP. Once the document is signed, the process can trigger the accounting posting—similar to the ECC/S/4HANA behavior you described.

Let me know if you need further input.

Best regards,

Chuma