Companies can now access the MCU module ahead of mandatory KSeF implementation in 2026, enhancing security through proper certificate management.
What is the Certificates and Rights Module (MCU)?
The Certificates and Rights Module (MCU) enables management of permissions in KSeF, submitting applications for certificate issuance, and downloading KSeF certificates.
The KSeF certificate allows for issuing and receiving invoices on behalf of the company that applied for its generation. A person holding the certificate can act on behalf of the entrepreneur.
For this reason, access to certificates should be strictly controlled and limited exclusively to trusted persons designated by the entrepreneur. Proper management of permissions in MCU significantly increases data security and minimizes the risk of unauthorized access.
Why Early Access to MCU KSeF is Beneficial
Although mandatory KSeF starts on February 1, 2026, users can already use MCU earlier. Early access to the Certificates and Rights Module allows companies to better prepare for changes in KSeF.
This gives entrepreneurs time to familiarize themselves with the MCU system and plan ahead for the process of granting permissions.
System Capabilities: What You Gain After Logging In to MCU
After logging in to MCU, the user gains access to the most important functions related to KSeF service, including managing permissions, submitting applications for certificates, and downloading certificates.
Logging In to MCU KSeF with Trusted Profile: Step-by-Step Instruction
To log in to the Certificates and Rights Module with a Trusted Profile, first go to the MCU system page available on the Ministry of Finance portal: https://mcu.mf.gov.pl/web/login
Step 1: Enter Company Data
At this stage, it is necessary to enter company data. First, select the company’s NIP. Then, in the appropriate place, enter the 10-digit tax identification number.
Step 2: Sign Documents
Next, you just need to sign the documents by pressing the “sign” button.
Step 3: Log In to Trusted Profile
The next step is logging in to the Trusted Profile. Entrepreneurs have several options – they can log in with their login or use electronic banking. You need to confirm the login with a password that will be sent by SMS to the phone number provided in the service.
Step 4: Access the KSeF Panel
After logging in and signing the documents, the main KSeF panel will appear. On it, in the side menu, two tabs will be displayed: “PERMISSIONS” and “CERTIFICATES”.