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Electronic seal · QSeal

Certum qualified electronic seal

Confirm that a document comes from your company — ideal for signing documents and invoices in bulk, including KSeF.

Order a seal How it works

A qualified seal (QSeal) is tied to a legal entity, not an individual. It guarantees the authenticity and integrity of documents issued automatically and at scale.

What you get

A seal for the company

Tied to the legal entity — confirms the document originates from your organisation.

Bulk invoices & KSeF

Perfect for automatically sealing large volumes of documents, including KSeF invoices.

Document integrity

Guarantees the content hasn't changed after sealing.

Who it's for

01

High-volume document issuers

Invoices, confirmations, bulk documents.

02

IT teams & integrations

Sealing within automated systems and processes.

03

Bookkeeping firms

Handling documents for many clients.

How we issue it

1

Enquiry

Tell us how many documents you seal — we'll advise on setup.

2

Company verification

We confirm company representation as required.

3

QSeal issuance

We issue the Certum qualified seal and help with rollout.

4

You seal

Seal documents manually or automatically, including in KSeF.

FAQ

How is a seal different from a signature?
A signature is tied to a person, a seal to a company. A seal confirms a document comes from the organisation — used e.g. for bulk invoice sealing.
Is the seal suitable for KSeF?
Yes. We'll advise whether you need a signature or a seal and how to configure invoice sealing for KSeF.
Can sealing be automated?
Yes — the QSeal works well in bulk processes and system integrations.

Order a QSeal

Message or call us — we'll prepare an individual quote for your sealing volume.

Order a seal +48 22 398 70 00