Firstly, as we may already know, printing an electronically signed document renders the signature invalid, being impossible to verify if the cryptographic mechanisms are valid. In addition, it is impossible to prove whether the signatory is the one who actually signed the document.

Secondly, mixing these types of signature raises issues regarding what is considered to be the original of the document. According to Luxembourgish law, when signing in wet ink, the document should be signed in as many originals as the signing parties and each and one of them is viewed as the original. However, article 1325 of the Luxembourg Civil Code provides an exception regarding e-signed documents. The electronic document is considered the original as long as all parties signed it electronically.

However, due to the mixing of signatures, the exception no longer applies. Based on this argument, in case of litigation, the agreement or contract is not validly concluded and its integrity is not guaranteed.

What if a party refuses to sign electronically a document? Indeed, one signatory can refuse to sign electronically, whether because he is not properly equipped to do so or for any other reason. In this case, the alternative is to turn to handwritten signature and follow the proper protocol in signing manually (which includes avoiding scanning the document and sending it by email).

To end in a more positive note… If mixing handwritten with electronic signature is highly discouraged, mixing different levels of electronic signature can occur and is allowed. For example, it may happen that during the signing process, one party signs using an Advanced electronic signature and the other a Qualified signature as defined in eIDAS regulation. According to Anne Reuland, our Chief Legal & Regulatory Officer, “such mix of electronic signatures does not render the document invalid, however, in case of litigation one might have to provide additional evidence for the lower level signatures, which would not be necessary for a Qualified electronic signature”.







The above represents LuxTrust’s understanding of the relevant law or regulation and should not be taken, relied on or interpreted as a legal opinion. Customers are encouraged to seek independent legal advice before taking any action or decision based on this information. LuxTrust may not be held liable for damages that may result from the use and/or interpretation of the information contained in this document.