PosteNum — The sovereign digital registered mail of La Poste du Sénégal
A legally binding registered letter, fully dematerialised, compliant with UPU and ECOWAS standards
The starting point
La Poste du Sénégal has provided universal postal service for over a century. Faced with the digitalisation of administrative and commercial exchanges, it needed a digital alternative to paper registered mail — with equivalent legal value, compliant with international standards (UPU) and ECOWAS regulations on electronic transactions.
The challenge to meet
Build a national digital trust infrastructure that guarantees document integrity, sender identity, non-repudiation of dispatches and evidential value before Senegalese courts — on a sovereign architecture with no dependency on foreign providers.
What we built
PosteNum is a multi-tier trust infrastructure: an identity module (strong authentication), a dispatch module (qualified electronic signature + timestamping), an archiving module (evidential preservation for 30 years), and an integration API for third-party systems (G2C, B2C, B2B). The architecture relies on an HSM hosted sovereignly in Senegal, compliant with eIDAS-aligned requirements.
Measured impact
- Operational use cases
- 3 G2C, B2C, B2B
- Innovation Challenge entry
- UPU Cologne, May 2026
- Regulatory compliance
- ECOWAS eIDAS-aligned
- Evidential archiving
- 30 years
- Sovereign hosting
- 100% Senegal