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Is it possible to have two electronic signatures?

In the digital age, we are doing more and more things online. Contracts, declarations, applications - we can sign all these things without leaving home, using an electronic signature. But did you know that there are different types of e-signatures and you can have more than one qualified signature?
4-minute read Updated: August 18, 2026

Is it possible to have two qualified signatures? And how do they actually differ from „ordinary” electronic signatures?

Types of 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 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 a 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 spheres of life: 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 various 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.
  • Various certifications: You can choose qualified signatures issued by different providers, which can be useful if you have technical problems with one of them.

Features of e-signatures - overview

Functionality and ease of use - convenience first and foremost

Having two qualified signatures is perfectly legal and can be practical. Remember, however, that each requires a separate certificate and electronic signature device. And most importantly, a qualified signature can only be used by the person to whom it was issued. 

For better illustration, we have prepared a simple summary of the types of signatures.

 

 

Qualified electronic signature

Advanced electronic signature 

Ordinary electronic signature

what does it look like?

A signature made with a qualified electronic signature device. It is based on a qualified electronic signature certificate

personal signature / e-card

trusted profile / trusted signature

Among other things, included in the footer of the e-mail message are data identifying the sender, such as name and surname

reliability of identity identification

high

average

low

enables identification of the owner

YES

YES

YES

assigned to only one person - unique

YES

YES

NO

is linked to the signed data, that any subsequent change is recognizable

YES

YES

NO

equivalent to a handwritten signature

YES

NO

NO

internationally recognized by law

YES

NO

NO

is based on a special electronic signature certificate

YES

NO

NO

security through the use of special certified qualified equipment

YES

NO

NO

If you are still in doubt about the differences between types of electronic signatures and need help deciding whether you need more than one qualified signature, contact us. 

We will be happy to advise you on which signature to choose and give you tips on how to use the signature SimplySign, even without the need for multiple signatures.

Qualified signatures SimplySign and Certum Mini

If you have any concerns or questions, please contact us

+48 22 417 05 55

We'll answer your questions, find a time that works for you, and match you with an advisor at one of our locations throughout Poland.

You can also write an email from us [email protected]. 

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