What is a qualified electronic signature?
A qualified electronic signature is the highest legal category of electronic signature under EU law. It is used to sign documents electronically with a level of legal certainty comparable to a handwritten signature. Under Regulation (EU) No 910/2014, known as the eIDAS Regulation, as amended, a qualified electronic signature is defined as follows: “an advanced electronic signature that is created by a qualified electronic signature creation device, and which is based on a qualified certificate for electronic signatures”.
In practice, this means that a qualified electronic signature combines three elements: a secure method of identifying the signatory, a qualified certificate issued by a qualified trust service provider, and a qualified signature creation device, which may also operate as a certified remote signature creation solution. The certificate confirms the identity of the person signing, while the technical infrastructure protects the integrity of the signed document and links the signature to a specific individual.
A qualified electronic signature should be distinguished from a simple electronic signature, such as a typed name in an email, and from other forms of advanced electronic signature. These tools may be useful in commercial practice, but they do not automatically have the same legal effect as a qualified electronic signature. Under Article 25(2) of the eIDAS Regulation, a qualified electronic signature has the equivalent legal effect of a handwritten signature across the European Union. In Polish law, this rule is reflected in the Civil Code, which treats an electronic statement of will bearing a qualified electronic signature as equivalent to written form.
What is a qualified electronic signature used for?
A qualified electronic signature is used where the law, the parties to a contract, or the level of transaction risk require a reliable and legally recognised method of signing documents remotely. It is commonly used in corporate, commercial, employment, tax, regulatory and administrative matters. For companies operating in Poland, it is often an essential tool for management board members, commercial proxies, accountants, compliance officers, HR teams and persons responsible for public filings.
Typical uses include signing commercial contracts, powers of attorney, corporate documents, employment-related documents, tax filings, financial statements, correspondence with public authorities, and documents submitted through electronic platforms. A qualified electronic signature may also be relevant in cross-border transactions, because a qualified electronic signature based on a qualified certificate issued by a qualified trust service provider in one EU Member State must be recognised as a qualified electronic signature in other Member States, provided that it meets the requirements of the eIDAS Regulation.
However, a qualified electronic signature does not replace every legally required form. Some legal acts still require a notarial deed, notarially certified signatures, use of a specific public system, or additional formalities under Polish law. For example, certain corporate changes, real estate transactions, inheritance matters or security instruments may require notarial involvement or registration with a public register. In such cases, the signature is only one element of a broader legal process.
When is it worth using legal support for a qualified electronic signature?
Legal support is useful when a business or an individual needs to determine whether a qualified electronic signature is sufficient for a planned action. This issue arises especially when signing high-value contracts, corporate resolutions, financing documents, transaction documents, statements submitted to authorities, or documents intended for use in several jurisdictions.
For private individuals, legal advice may be needed when signing civil law agreements, powers of attorney, settlement documents, declarations to public authorities, or documents connected with employment, real estate, succession or family matters. For entrepreneurs, the key questions usually concern the validity of electronic contracting, representation rules, internal authorisation, document retention, evidentiary value, and compliance with sector-specific requirements.
Early consultation with a lawyer may help avoid common mistakes, such as using the wrong type of electronic signature, signing by a person who is not authorised to represent the company, omitting required corporate approvals, or assuming that a qualified electronic signature is sufficient where the law requires notarial form. Such errors may lead to disputes about validity, delays in registration, refusal by an authority, contractual liability or financial loss.
It is also important to verify the technical and evidentiary aspects of signing. A correctly signed electronic document should allow verification of the certificate, the identity of the signatory, available time validation information, and whether the document was modified after signature. In more complex matters, it may also be necessary to use a qualified electronic time stamp, define signing order, preserve audit trails, or implement internal procedures for remote signing.
Support of the law firm in matters involving qualified electronic signatures
Support in the area of qualified electronic signatures may include in particular:
- assessing whether a qualified electronic signature is sufficient for a planned legal act or filing,
- reviewing contracts and corporate documents intended for electronic signature,
- advising on representation rules and authority to sign on behalf of a company,
- preparing powers of attorney and internal signing procedures,
- supporting management boards and shareholders in remote corporate actions,
- assessing the evidentiary value of electronically signed documents in disputes,
- advising on cross-border recognition of qualified electronic signatures under eIDAS,
- identifying situations where notarial form, registration or additional formalities are required.
A qualified electronic signature is a practical tool for secure electronic transactions, but its legal effect depends on the type of document, applicable law, representation rules and required form. Before signing important documents electronically, it is advisable to confirm whether the chosen method is legally sufficient and properly documented.
Need help with a qualified electronic signature or electronic signing of legal documents? Contact us.