Status 400 covers a delivery rejection by the buyer's Access Point and a tax reporting failure. Identify which one you received, then correct the invoice or contact support.

The buyer's Access Point rejected the invoice. Delivery failed. The rejection reason appears in the StatusReason field of the notification.

Steps:

1. Review the rejection reason.

2. Correct the invoice data.

3. Submit a new invoice with a new invoice number. Don't reuse the original invoice number.

TDD reporting failure (400 — eMLR RE)

Unimaze submitted the TDD to the Slovak FA, but the report was rejected. The invoice was delivered to the buyer — the TDD failure is a separate reporting obligation.

Steps:

1. Review the error details in StatusReason.

2. Contact Sovos support. TDD failures may require Unimaze involvement to resolve.

Important:

Both MLR RE and eMLR RE return SCICloudStatusCode 400. The SCIGovtStatusCode field in the notification distinguishes between them.