PKCS#11 Token Configuration
The PKCS#11 token (USB signing key) is essential for electronically signing your invoices. This step must be performed in the Fatoora App desktop application.
For the Fatoora App plan, signature settings are configured directly in the desktop application — the web portal simply indicates that configuration is done locally.
Connecting the Token
- Insert your TunTrust token into a USB port on your computer
- Wait for Windows to install the driver if needed
- In Fatoora App, go to Settings → USB Key / PKCS#11

Automatic Detection
Fatoora App automatically detects available tokens:
- Connect your USB token to the PC
- Click "Test key"
- Enter your PIN code and confirm
- The list of connected tokens and their certificates is displayed

If multiple tokens are connected, the TunTrust token takes priority.
Certificate Information
For each detected certificate, the application displays:
| Field | Description |
|---|---|
| Subject | Name of the certificate holder |
| Issuer | TunTrust CA |
| Validity | Start date (NotBefore) and expiry date (NotAfter) |
| Serial number | Required when creating your account on adhesion.elfatoura.tn |
| SHA-1 fingerprint | For identification and verification |
Next step
Once the token is configured, proceed to TTN credentials configuration: