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Electronic Seal | Lex Corporation

Qualified Electronic Seal | Lex Corporation
Digital Transformation • eIDAS Compliant

Qualified Electronic

A solution utilizing a qualified electronic seal certificate, ensuring that documents sealed with an electronic seal retain full legal and evidentiary validity. This includes Certum Electronic Seal in the Cloud – the innovative cloud-based electronic seal on the market.

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Where precision meets mobility

Administrative & Compliance

Authenticate official documents, financial reports, and public submissions with full legal certainty. Ensure integrity and origin of documents submitted to Polish authorities.

Business & Invoicing

Securely issue and receive structured invoices via the National System of e-Invoices (KSeF). Protect contracts, financial statements, and B2B documentation with qualified electronic seal.

Corporate Use

Apply a digital company stamp to any document. Maintain authenticity and non-repudiation for internal and external business processes without a physical stamp.

Adjust technology to your needs

Certum Electronic Seal in the Cloud

Certum Electronic Seal in the Cloud

The innovative cloud-based qualified electronic seal. Seal documents securely from your smartphone, tablet, or computer anywhere in the world. Ideal for KSeF invoicing and high-volume business use. No hardware required.

Certum Mini Electronic Seal

Certum Mini Electronic Seal

Qualified electronic seal stored on a cryptographic Mini smart card with USB reader. Perfect for workstation-based, high-security corporate environments requiring physical token control.

Efficiency in the
Digital Era

Certum Qualified Electronic Seal is a versatile, eIDAS-compliant solution that guarantees the authenticity and integrity of documents. It is accepted by all key Polish public systems, including the National System of e-Invoices (KSeF), and provides full legal and evidentiary value.

  • National System of e-Invoices (KSeF)
  • Financial statements and reports
  • Official submissions to public authorities
  • Contracts and agreements
  • Bank and insurance documents
  • Internal company documentation
  • Public procurement and tenders
  • EPREL and other EU registries

Ready to secure your company documents?

Choose the 3-year validity period and enjoy full mobility with Certum cloud seal or traditional Mini card security.

Visit Certum’s Website Book visit now

Frequently Asked Questions

What is a Qualified Electronic Seal?↓
A Qualified Electronic Seal is the digital equivalent of a company stamp. It guarantees the authenticity and integrity of a document and is issued to a legal entity (company or organisation).
What is the difference between electronic signature and electronic seal?↓
A signature identifies and binds an individual person. A seal identifies and binds a legal entity (company) and ensures document integrity.
Is the electronic seal legally binding?↓
Yes. Under eIDAS, a qualified electronic seal has the same legal effect as a traditional company stamp and provides full evidentiary value.
What is Certum Electronic Seal in the Cloud?↓
It is Certum’s innovative cloud-based qualified electronic seal. You can apply the seal to documents directly from your smartphone, tablet or computer without any physical hardware.
Is the cloud seal suitable for KSeF?↓
Yes. It is fully compatible with the National System of e-Invoices (KSeF) for secure issuance and receipt of structured invoices.
Which devices are supported?↓
All modern devices: iOS, Android, Windows, and macOS.
How secure is the electronic seal?↓
It uses the highest cryptographic standards and qualified certificates issued by Certum. Every seal is tamper-proof and includes qualified timestamps.
Are sealed documents admissible in court?↓
Yes. Qualified electronic seals have full legal and evidentiary validity in Poland and across the EU.
How do I verify a sealed document?↓
Verification is instant in Adobe Reader or using free Certum validation tools.

Still have questions? Book a consultation with our specialist