When your client signs a document digitally with Visma Addo it is legally valid in exactly the same manner as if they had signed on a piece of paper. The provable security is even greater in the case of Visma Addo than with paper.
Proof value of NemID
The NemID solution entails that the user is issued with a digital signature consisting of a private key and a certificate with a public key. The central element in the NemID solution is that only the user has control over the private key, which is protected by a personal access code ("something you know") and a code from a key card with single use codes ("something you have").
An agreement document signed with the user's private key card contains therefore secure proof that it was the user of that key card who entered the agreement.
As with agreements entered into on paper, there may arise a problem of proof if the digital documents are damaged or deleted.
Proof value of digital signature
In the case of signatures made directly on to a touchscreen or with a mouse, these are equivalent to a signature on paper. The proof value of an agreement signed in this way is therefore fundamentally the same as an agreement signed on paper.
Visma Addo, though, keeps a log recording every transaction made in the solution, so that at any time it can be seen which email address a document is sent to and when a document has been signed and returned. This gives a greater degree of provable security than a physical signature where such data does not exist.
Provable security is further increased as the parties to the agreement receive an email immediately after the signing that confirms the agreement that has just been entered into (the agreement is attached to the email). If the receiver does not respond to this email, it will subsequently be very difficult for this party to convince a court that the agreement was not entered into.