Qualified Trust Service -
electronic signature, electronic seal,
e-Delivery
Why Choose Our Sevices?
Global
Works worldwide regardless of location
Mobile
Mobile e-Seal in the cloud
Secure
Trusted QSeal in the cloud
eIDAS
Fully compliant with EU eIDAS regulations
Legal
Full evidentiary value and legal effectiveness
Compliant with European eIDAS regulation
The highest level of assurance for the verification of your Qualified Electronic Seal, Qualified Electronic Signature (QES) fully compliant with the European eIDAS Regulation. An electronic document signed with a Qualified Electronic Seal and Qualified Electronic Signature (QES) has full evidentiary value and legal effect.
With a Qualified Electronic Seal, you will create an account for your company in the National e-Invoice System (KSeF).
Electronic Signature
Convenient and secure electronic document signing, legally effective for tax filings, HR contracts and other official agreements.
Electronic Seal
Convenient and secure electronic document signing, legally effective for use in the National e-Invoice System (KSeF).
e-Delivery
Convenient and secure platform, legally valid for the e-Delivery system and for sending registered letters online.
Verify your identity online – fast & secure
Face-to-face video verification with expert assistance
Certum has implemented a fully digital solution, providing a new level of identity verification required to activate Qualified Electronic Signatures (QES) and Qualified Electronic Seals (QSeal). It has been integrated into selected Certum certificates and is the primary verification method for the new SimplySign Qualified Electronic Seal. This solution was developed in collaboration with IDnow.
With IDnow Online Ident, you can quickly confirm your identity digitally and sign the contract online. All you need is a mobile device, a stable internet connection, and a valid passport. Avoid the hassle of sending paper documents to Poland or presenting your passport in person at our office in Poland.
As of 1 February 2026, companies will be required to issue e-invoices via the National e-Invoicing System (KSeF). One of the key methods of authentication in the system is the Qualified Electronic Seal.
Legal basis
The Act of 29 October 2021 on the Amendment of the Act on Value Added Tax and Certain Other Acts (Journal of Laws of the Republic of Poland, 2021, item 2076).
Q&A
The obligation to use the National e-Invoicing System (KSeF) applies to:
- all active VAT taxpayers,
- taxpayers exempt from VAT (domestically),
- taxpayers with a NIP identifier using the OSS procedure,
- micro-entrepreneurs – depending on the implementation stage.
A Qualified Electronic Signature identifies a natural person, while a Qualified Electronic Seal identifies a legal entity (company).
You need to undergo a remote or in-person identity verification with a trusted provider with Certum, and activate the signature in the SimplySign app or on a cryptographic card. Contact us to get more details.
Yes. A Qualified Electronic Signature is one of the methods required to confirm your identity and activate your e-Delivery account.
No. The e-Delivery system requires identification of individuals. The seal is mainly used for corporate document authentication and KSeF.
No. A Qualified Electronic Seal is always linked to a single company, because the company’s VAT (NIP) number is the unique identifier in the KSeF system. Each company must have its own seal.
A document signed with a Qualified Electronic Seal (QSeal) has the same legal effect as one bearing a traditional company seal, but in digital form it also provides full evidentiary value. The QSeal guarantees the integrity of the document and uniquely identifies the legal entity from which it originates. Under the EU eIDAS Regulation, such a document is recognised as authentic and legally binding in legal and business transactions.
A valid Qualified Electronic Signature with PESEL is required to activate the company’s e-Delivery account.
Yes. Foreign users can obtain a Qualified Electronic Seal (QSeal) for use in the Polish KSeF system via remote video verification, provided they present a valid passport. The Qualified Electronic Seal (QSeal) will be linked to the company’s Polish VAT (NIP) number, which serves as the unique identifier in KSeF.
Yes. A foreign citizen can obtain a Qualified Electronic Signature remotely through video verification using a valid passport. The certificate can be issued in a mobile application (such as SimplySign) or on a cryptographic card. It is fully compliant with the EU eIDAS Regulation and legally valid across all EU member states.
EPREL (European Product Registry for Energy Labelling) is the official EU database where manufacturers and importers must register products covered by energy labelling regulations, such as household appliances, lighting, televisions, or air conditioners. Registration is mandatory before the products can be placed on the EU market. EPREL provides consumers with access to detailed information about the energy efficiency class and technical parameters of each product.
To access EPREL, a company must obtain a Qualified Electronic Seal (QSeal) linked to its KRS number. The organization profile in EPREL is verified by sealing the verification file with this QSeal, which confirms the company’s identity and grants access to register products.
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