As a buyer you can return an accepted, rejected, or in-process response to the supplier over the PEPPOL network. It isn't required by Slovak regulation, but it helps a supplier correct an invoice.

After receiving an invoice, you may want to send the supplier a response through the PEPPOL network to acknowledge receipt or flag a problem.

Slovakia follows standard PEPPOL Invoice Response (PEPPOL BIS IMR) practice. Sending an Invoice Response is not required by Slovak regulation for B2B, but it's considered good practice, especially when you need to formally reject an invoice so the supplier can issue a correction.

There are three response types:

• Accepted (AP): The invoice is valid and accepted for payment. Send this once you've approved the invoice for processing.

• Rejected (RE): The invoice has an error. Send this if the invoice contains incorrect data or can't be accepted. Include a reason so the supplier can issue a corrected invoice or credit note.

• In Process (IP): The invoice is under review. Send this if your approval process takes time, so the supplier knows the invoice was received.

To submit a buyer Invoice Response, contact your Sovos implementation team for the correct API endpoint and request body for Slovakia.