Is it possible to have two electronic signatures?

The Electronic Signature Act of September 18, 2001(Journal of Laws of 2001 No. 130 item 1450) defines three types of electronic signatures:

• Electronic signature - the simplest form, data in electronic form that is attached to or logically linked to other data in electronic form and that is used by the signer as a signature (Article 3(10)). Examples include a handwritten signature on a graphics tablet, a scan of a signature, or even clicking "I accept" in the terms and conditions.
• Advanced electronic signature - that meets additional requirements, including being uniquely assigned to the signer and allowing the signer to be identified (Article 3(11)). An example is the signature used in electronic banking.
• Qualified electronic signature - a type of advanced electronic signature that is made using a qualified electronic signature creation device and that is based on a qualified electronic signature certificate (Article 3, Section 12 of the Law). This is the only type of e-signature that has the the same legal force as a handwritten signature.

Why do you need more than one qualified signature?

Since a qualified electronic signature is equivalent to a handwritten signature, you may be wondering, why do you need more than one? Well, having two (or more) qualified signatures can be useful in the following situations:

• Separation of life spheres: You may want to separate private and professional matters, using one signature to handle official matters and another to sign company documents.
• Signing documents on behalf of different entities: If you run several companies or act as a proxy, you may need a separate signature for each entity you represent.
• Backup: If one of the signatures fails or is lost, the other will serve as a fallback.
• Different certificates: You can choose qualified signatures issued by different providers, which can be useful if you have technical problems with one of them.