Legal Validity of the Advanced Electronic Signature

Tsubacheck adheres to the current stipulations for advanced electronic document authentication and data privacy laws (eiDAS and GDPR).

Tsubacheck, advanced electronic signature system that complies with the European eIDAS and RGPD regulations.

Europe is at the forefront in the definition of regulations for electronic authentication at a global level, with its guidelines adopted by the member states of the Union. The eIDAS (Electronic IDentification, Authentication and trust Services), under Regulation 910/2014, establishes guidelines for trust services and electronic signatures in the digital environment.

Tsubacheck eidas

Legal validity of Tsubacheck

Tsubacheck adheres to the current European laws for advanced electronic signatures


Before proceeding to the online signature, the signatory is clearly and precisely identified by means of biometrics, ensuring unambiguous authentication.


By using Blockchain to record the process, the unalterability of the information once signed is guaranteed, ensuring that it has not been subsequently modified.

In judicial situations where it is necessary to present digital evidence, the onus is on the presenter to prove the validity of such evidence. OTP-based systems, such as SMS messages, may raise uncertainties about the true identity of the individual entering the code. This difference is crucial, as legal precedents have questioned the reliability of OTP evidence and may even be dismissed in court proceedings. Unlike the biometric authentication methods implemented by Tsubacheck, which offer much more secure user identification.

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