Same probative value as a postal registered letter and a handwritten signature. The best market response to the European Union standard eIDAS 910/2014.
The acknowledgements of receipt and the NOPAPERPOST Certificates constitute testimonial evidence. NOPAPERPOST, Digital Trusted Third Party, is the qualified witness of the messaging transaction.
Certificates issued by digital trusted third parties attached to registered electronic mails and to the storage of digital documents are admissible in court as evidence by witness or as prima facie evidence in writing (with the effect of reversing the burden of proof on those against whom they are opposed).
The acknowledgement of receipt and the NOPAPERPOST certificates shall constitute evidence in writing. NOPAPERPOST is the best response to the legal provisions below. NOPAPERPOST services, fully developed and hosted in France, are not subject to the USA Patriot Act and are not subject to the extraterritorial legislation of that State.
GDPR REGULATION (EU) 2016/679 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 27 April 2016 on the protection of individuals with regard to the processing of personal data and on the free movement of such data.
* Nopaperpost signature: Certificate Authority.
https://letsencrypt.org/about/
** Nopaperpost timestamp: Virtual time server cluster.
http://www.pool.ntp.org/de/vendors.html