We provide comprehensive advisory services for implementing a qualified electronic seal – we support clients in selecting the optimal authentication method, designing the permissions model, preparing internal procedures, and ensuring secure integration with financial-accounting and ERP systems.
securely implement KSeF,
automate the e‑invoice issuance process,
ensure operational continuity of their finance department.
In practice, we most often work with CFOs, management board members, finance directors, and accounting teams responsible for regulatory compliance.

analysis of whether a qualified seal, a qualified signature, or another authentication method is better for the operational model,
preparation of required data and documents for certificate issuance,
support in configuration and authentication testing,
training for the team and preparation of short operational instructions.
Yes – regardless of whether the authorized person is a Polish citizen or a foreign national, the entire process can be completed online, including identity verification via video call, in accordance with the requirements of a Qualified Trust Service Provider.

An electronic seal is data in electronic form linked to other electronic data to ensure the origin and integrity of that data. In its qualified version, the e‑seal:
is based on a qualified certificate issued by a Qualified Trust Service Provider (QTSP),
meets strict security requirements and has strong legal effect within the EU,
identifies primarily the entity (legal person), not a specific individual.
This is an important distinction: a qualified signature attributes the signing action to a person, while a qualified seal attributes it to an organization (e.g., a company).
For many organizations, this means the ability to separate the invoicing process from the physical availability of management board members.
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To use KSeF, the user must authenticate (confirm identity or authorization). In practice, depending on the scenario, several authentication methods can be used, including a qualified electronic seal.
Implementing a qualified electronic seal in KSeF guarantees efficient handling of formalities, including:
Ensure continuity of invoice issuance in KSeF:
See also
Choosing the right authentication method in KSeF directly affects the security, continuity, and efficiency of the invoicing process. The decision should not be random – the signature and seal differ in scope of responsibility, operating method, and automation capabilities.
Below are the key differences to help match the solution to the company’s operating model.
| Criterion | Qualified signature | Qualified electronic seal |
| Who does it identify? | A natural person (e.g., board member) | The entity (e.g., company) |
| Link to representation | Linked to a specific individual and their authorization | Linked to the organization as a whole |
| Dependency on personal availability | Yes – requires signer availability | No – works independently of a specific person |
| Automation in ERP / mass invoicing | Limited | High – recommended for bulk invoicing |
| Staff rotation / board changes | Requires updating signatures | Requires changes with rotation and issuing a new seal |
| Use in KSeF | Suitable for smaller-scale operations | Optimal for companies with high invoice volume |
| Responsibility model | Personal | Organizational |
Qualified signature – suitable for a smaller invoicing scale and processes strongly tied to a person representing the company.
Qualified electronic seal – recommended for ERP integration, mass invoicing, and organizations wanting to reduce operational risk and dependence on the management board.
Selecting the right model early in the KSeF implementation avoids later organizational and technical modifications that can be time-consuming and costly.
In KSeF, each authentication action represents acting on behalf of the business. If the authorization model does not reflect the company representation rules stated in the register or company agreement, the correctness of operations may be questioned.
Therefore, implementing a qualified electronic seal should be preceded by an analysis of organizational responsibilities.
That is why the implementation should combine technical, organizational, and legal aspects.
We assist companies because the most common problems arise where:
roles are not clearly divided (IT, accounting, sales), complicating audits and access control,
ERP integration is not properly prepared, and seals/certificates do not match the invoicing workflow,
procedures for changes in representation or employee turnover are missing,
tool‑purchase decisions are made without a unified signature/seal policy.
Our support goes beyond selecting and purchasing the solution – we streamline the entire operational model to ensure KSeF is secure, compliant, and does not obstruct the company’s daily work.

Director of Company Law Department and Corporate Secretarial Services
ul. Wronia 10
00-840 Warszawa
Polska
Office reception: +48 22 295 33 00
Sales department: +48 22 295 3104
contact@tgc.eu
NIP: 525-22-71-480, KRS: 0000167447,
REGON: 01551820200000. Sąd Rejonowy dla
m.st. Warszawy, XII Wydział Gospodarczy