What is legal presumption?
Under eIDAS Article 41, a qualified electronic timestamp benefits from the presumption of the accuracy of the date and time it indicates, and the integrity of the data to which that date and time are bound. This means that in any legal proceeding, the burden of proof shifts: anyone challenging the timestamp must prove it is inaccurate, rather than the presenter having to prove it is correct.
Practical consequences
This legal presumption is enormously powerful. In contract disputes, a qualified timestamp proves when an offer was made or accepted. In intellectual property disputes, it proves prior art or creation date. In regulatory compliance, it proves when a report was filed or a record was created. Courts must accept the timestamp as accurate unless contradicting evidence is presented.
Non-qualified timestamps
Non-qualified timestamps do not benefit from any legal presumption. They may still be admitted as evidence, but their accuracy and reliability must be positively demonstrated by the party relying on them. This presents a significant evidentiary disadvantage compared to qualified timestamps.
Cross-border enforcement
The legal presumption applies uniformly across all 27 EU member states plus EEA countries. A French court cannot refuse to recognise a qualified timestamp from a German QTSP. This cross-border consistency is one of the most significant achievements of the eIDAS framework.