Qualified electronic signature (QES)

A qualified electronic signature (QES) is the highest level of electronic signature under the EU's eIDAS regulation: an advanced electronic signature that is created by a qualified signature creation device and based on a qualified certificate for electronic signatures. It is the only type of e-signature that eIDAS says has the equivalent legal effect of a handwritten signature, and a QES issued in one member state must be recognized in all others.

Getting one involves several steps. First, the signer's identity is verified by a qualified trust service provider, either in person or through an approved remote method such as video identification or a national eID. The QTSP then issues a qualified certificate tied to that person. At signing time, the signature is created on a qualified device, which today is often a remote hardware security module operated by the provider, with the signer authorizing each signature using strong authentication.

Imagine a notary-heavy transaction in Germany, or a public tender in Italy where the procurement rules require a qualified signature. A company director signs the bid documents with a QES from an accredited provider, and the receiving authority can validate the signature against the EU trusted lists without any further paperwork.

The main misconception is that a QES is necessary for ordinary business contracts in Europe. It usually is not. National law determines which documents need handwritten-equivalent form, and for most commercial agreements a simple or advanced electronic signature is valid and admissible. Another misunderstanding is that a QES is universally recognized outside the EU. Its special status comes from eIDAS; in the US, for example, the ESIGN Act treats it like any other electronic signature.

Qualified signatures also cost more and add friction. Identity onboarding can take minutes or longer, and signers who do not already hold a qualified certificate may abandon the process. That is a real trade-off for consumer-facing documents.

Our take: QES is the right tool when a law or a counterparty explicitly demands it, and a poor default otherwise. If you are unsure, ask whether your specific document has a form requirement before paying for the strongest signature on the market.

eSignSimple does not offer qualified electronic signatures. Our product provides simple electronic signatures with an audit trail, certificate of completion and SHA-256 hash verification. If you need a QES, you will need a qualified trust service provider listed on an EU trusted list.