QES: Multiple Signature Fields per Document are now permitted

Qualified Electronic Signature (QES) now supports multiple Signature Fields per Signer per Document. Previously, adding more than one QES Signature Field triggered a blocking error: this restriction has been removed.

Key behaviors to be aware of:

• Single Signature: A single cryptographic Signature covers all signature images on the Document. This differs from SES and AES, but meets the legal requirement — one technical Signature is sufficient for a valid electronic signature.
• Signature panel: With multiple QES Signature Fields converted directly into images, clicking a Signature Image in an external PDF reader will not open the signature panel directly. The panel is still accessible and of course the Signature remains valid.
• Locked PDFs: Multiple QES Signature Fields are not supported on locked PDFs.

For full details, see the QES level specificities guide and the Signature Fields API reference.