KSeF notifications - does KSeF notify you about new invoices and how can you enable alerts?

This material is for informational purposes only and does not constitute tax or legal advice.

KSeF does not automatically notify you when a supplier issues an invoice to your company. The document may already be available in the National e-Invoice System while you are still unaware of it. To check whether a new invoice has arrived, you need to log in to KSeF or use software that regularly monitors the system and notifies you about new activity.

The Polish Ministry of Finance explicitly confirms that KSeF does not send automatic notifications when a new invoice is received. This matters for more than convenience. In the standard KSeF process, an invoice is considered received when it is assigned a KSeF number. The recipient does not need to open, download or accept the document first. You can find the official explanation in the Ministry of Finance guidance on issuing and receiving invoices in KSeF.

In practice, this creates two different moments: the moment when the company formally receives an invoice and the moment when someone actually notices it and takes action.

KSeF notifications can help reduce the gap between the two.

KSeF has changed how companies receive invoices

The National e-Invoice System, known as KSeF, is a government platform used to issue, send, receive and store structured invoices. Documents in KSeF are not ordinary PDF files sent as email attachments. They are stored as standardized XML files compliant with the official FA 3 logical structure, which has been in force since 1 February 2026.

Mandatory KSeF use was introduced in stages. From 1 February 2026, the obligation to issue invoices through KSeF applied to businesses whose gross sales exceeded PLN 200 million in 2024. From 1 April 2026, the requirement was extended to other businesses, with a temporary exemption for the smallest entities. Companies whose monthly sales documented by invoices do not exceed PLN 10,000 gross will become fully subject to the invoicing requirement from 1 January 2027. The full implementation schedule and scope of the mandatory system are described by the Ministry of Finance on the official KSeF website.

Receiving invoices works differently, however. The obligation to receive invoices through KSeF came into force on 1 February 2026. This introduced a significant change to the everyday workflow of many businesses.

Previously, an invoice often arrived directly in a company inbox. Even if the process was not perfectly organized, the email itself acted as a notification. Someone saw the message, forwarded the document to accounting, checked the amount or added the payment to planned expenses.

In KSeF, a document can appear without such a signal. The seller does not have to send the invoice separately by email simply because it was issued through KSeF. The invoice is already available in the system. As invoice processing becomes increasingly automated, this creates a new practical question: how does a company know when something new has appeared in KSeF?

Does KSeF send an email when a new invoice arrives?

No. KSeF does not send a standard email, SMS or push notification informing the company that a new invoice has been issued to it. The Ministry of Finance explains the lack of automatic system notifications in its official KSeF 2.0 manual.

The Ministry of Finance provides free tools that allow businesses to access their documents, including the KSeF Taxpayer Application and the KSeF Mobile Application. Users can log in, view the list of documents and download invoices. More information about the available tools can be found in the official KSeF resources for sole traders and SMEs.

However, someone still needs to remember to check the system.

For a company receiving only a few invoices per month, this may not be a major issue. The situation changes when the number of documents grows, the company works with many suppliers or several people are involved in the invoice workflow.

It is easy to end up in a situation where the business owner assumes accounting is checking KSeF, accounting is waiting for documents from the company, and the invoice has already been sitting in the system for several days.

Why can the lack of KSeF notifications become a problem?

The invoice itself does not disappear. However, delayed information can delay everything that is supposed to happen next. A document may not reach the person responsible for verifying it in time. An unexpected cost may not be included in the short-term payment plan. A question about an incorrect amount may only be raised several days later. An invoice may also require confirmation that a service or delivery has been completed before it can be approved for payment.

The issue is therefore not where the document is stored. The issue is the delay between information appearing and the company reacting to it. This can be particularly important for small and medium-sized businesses without a dedicated internal finance department.

A business owner may simultaneously be responsible for sales, employees, customers and cash flow. An external accounting office handles bookkeeping and taxes, but it is not always responsible for everyday payment decisions or invoice approvals.

KSeF organizes the flow of documents, but it does not automatically solve the problem of attention. This is where KSeF monitoring can become an additional layer between the system and the people who need to act.

How can you check for new invoices in KSeF?

Companies can approach KSeF monitoring in several ways. The simplest model is manual checking. The business owner or another designated person regularly logs in to KSeF and reviews new documents. This does not require implementing another tool, but it does require consistency and clearly assigned responsibility.

The second option is to use accounting or invoicing software integrated with KSeF. Such software may retrieve invoices and make them available directly within the system already used by the company. However, it is worth checking whether the software actually monitors KSeF automatically and sends notifications about new activity, or whether it simply synchronizes documents under specific conditions.

The third model is a separate KSeF monitoring service. Its purpose does not have to be issuing invoices, keeping accounting records or replacing the company's financial system. It can simply operate in the background, regularly check KSeF and notify the user when new activity appears. This is the model used by Brieffin.

Brieffin monitors KSeF and sends an alert when it detects a new event. Users do not need to remember to log in to yet another system simply to check whether anything has changed.

How do KSeF notifications work in Brieffin?

Brieffin acts as an information layer between KSeF and the business owner. Once KSeF is connected, Brieffin monitors new activity and sends information to the user. Notifications can be delivered by email or Telegram. The idea is not simply to send a message saying that "a new record has appeared in the system".

An alert should help the user quickly understand what the event relates to without starting another manual search. Instead of having to remember to check KSeF, the company can reverse the process: the information comes to the user when something new happens.

KSeF alerts in Brieffin are free. You also do not need to connect a bank account to use them. Connecting a bank account is optional and can be done later if the user wants to access developing features related to cash flow and financial analysis.

What should a good KSeF notification include?

Sending an alert is not enough on its own. If a notification forces the user to log in to several different systems just to understand what it actually refers to, only part of the problem has been solved.

A useful KSeF notification should allow the recipient to quickly identify the event and decide whether it requires action. Timing also matters. An alert sent several days after a document appears does not solve the problem of manual checking. Monitoring should work in the background and detect new activity as quickly as possible.

The communication channel matters too. Email works well when the message needs to be saved, forwarded or found again later. Telegram may be more convenient for people who prefer short, immediate notifications. Not every company needs every available channel. What matters is that the notification arrives somewhere it will actually be noticed.

KSeF notifications and data security

Connecting an external application to KSeF naturally raises questions about security and access permissions. KSeF allows different permissions to be granted, including separate permissions for viewing and issuing invoices. For a monitoring tool, the principle of least privilege is particularly important.

If an application's role is to read information and detect new activity, it should not receive permissions to perform actions it does not need. Brieffin operates in read-only mode. This means it can monitor connected data, but it cannot issue invoices, modify documents or transfer money. It also does not store the user's signing key.

As a result, KSeF monitoring remains an informational function. Brieffin observes new activity and informs the user, but it does not perform financial operations on behalf of the company.

Do you need to connect a bank account to monitor KSeF in Brieffin?

No. KSeF alerts in Brieffin work independently of a bank account. You do not need to connect your bank to use the free KSeF monitoring functionality. This is particularly useful for companies that want to start with one very simple use case: knowing when new activity appears in KSeF.

Connecting a supported bank account is optional and is related to broader Brieffin features focused on monitoring company finances. In practice, a business can start with one specific need, KSeF notifications, and decide later whether it wants to use additional analytical features.

KSeF is growing, making manual checks increasingly difficult to treat as a reliable process

Use of KSeF increased rapidly after the system became mandatory. According to government data as of 30 June 2026, the system contained more than 512.7 million invoices. The number of issuers exceeded 2.28 million, while the number of domestic recipients listed on invoices exceeded 4.49 million.

KSeF is therefore no longer an additional channel that a business can check from time to time. For a significant part of the market, it has become a core part of the invoice workflow. The more processes are moved into one system, the more important it becomes to think not only about access but also about how day-to-day monitoring is organized.

Manual login can be a process. But it is a process someone has to remember.

Who can benefit most from KSeF alerts?

KSeF notifications can be particularly useful in companies where documents appear regularly but there is no internal finance department responsible for monitoring them every day. This includes small business owners, companies working with external accounting firms and teams where responsibility for purchases, cost approval and payments is divided between several people.

Monitoring can also be useful for companies managing several entities. In this model, repeatedly switching between different KSeF contexts increases the number of tasks someone needs to remember. This does not mean that every invoice requires an immediate alarm. 

The goal is not to create another stream of notifications. The goal is to make sure important information appears while the company still has time to respond.

How can you implement KSeF monitoring in your company?

A tool alone cannot replace a simple internal process. It is worth deciding who should receive notifications and what should happen after an alert arrives. 

In a small company, the process can be very straightforward. A notification goes to the owner or an administrative employee. The recipient checks the supplier and document and then forwards the invoice for approval or accounting, or includes it in planned payments. If something about the document raises questions, the company can react earlier instead of discovering the issue when preparing a bank transfer or closing the month.

Automatic monitoring also does not mean that periodic checks should disappear completely. A company can still review all documents once a week or once a month. The difference is that everyday monitoring no longer needs to depend entirely on human memory.

Brieffin keeps an eye on KSeF in the background

KSeF solves the problem of standardized invoice circulation. It does not solve the problem of attention. It does not automatically tell you that a new invoice has appeared. It does not remind you to check the system. It does not know who in your company should take an interest in a new document.

Brieffin adds that missing layer. It monitors new KSeF activity and sends an alert by email or Telegram whenever a new event appears.

No daily logins. No need to connect a bank account. No fees for KSeF alerts.

One less thing to check.

Enable free KSeF alerts with Brieffin.