Rejection business message

The new requirements mandates that a business message must be submitted from the customer to the supplier before the tax reporting of the rejection is done with the Tax Administration.

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This mandate is effective from 15th August 2026.
Until now, the rejection has only been reported to the Tax Administration directly, but this requirement adds the instant notification to the supplier as well.

We will register the capability of all Croatian participants to receive and start sending the rejection business messages:

on PRODUCTION this will go live on midnight on Sunday 14th August. .
on OUR SANDBOX this will go live on Sunday 7th August.

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Please note that on sandbox, we now have the ability to upload your client's demo certificate for fiscalisation to ease your testing and to overcome the limitations of the Croatian testing network.
Demo certificates can be found and obtained on this page: https://www.fina.hr/finadigicert/certifikati-za-testiranje-i-demonstraciju under the title Aplikacijski Demo certifikat za fiskalizaciju (Application Demo certificate for fiscalization). We have verified the support for the RSA 2K certificates.

On the customer side

You have two options:

If you have been using our Register a rejection route, we will generate the business message automatically and send to the supplier on behalf of the customer. This is the recommended approach.

You will receive Acknowledgement and Accept MLRs for the delivery of this business message, as well as an eMLR (as before) for the tax reporting.
Send the Rejection business message from the supplier to the customer by forming he business message according to the Applikacijski odgovor za obijanje računa specifications (English version available upon request) and send via the Create a business transaction route. This will deliver the rejection message and then trigger the rejection tax reporting.

You will receive Acknowledgement and Accept MLRs for the delivery of this business message, as well as an eMLR with Accept or Reject for the tax reporting.

On the supplier side

In a similar manner as you have been monitoring and handling the processing of inbound invoices and credit notes, now you will also have to handle the inbound rejection business messages.

The main parameters you are interested in are the rejection reason (text) and the type of rejection: a) mismatch affecting taxes, b) mismatch not affecting taxes and c) other.