Sovos can only deliver to a buyer registered in the Slovak SMP, and there is no pre-check endpoint. Confirm registration with the buyer before you submit.

Before submitting an invoice, confirm the buyer's PEPPOL participant identifier is registered and active in the Slovak SMP. If the buyer isn't registered, Sovos can't route the invoice and submission will fail.

To check buyer registration:

1. Contact the buyer and ask them to confirm their PEPPOL participant identifier and that they have an active registration with a PEPPOL-accredited Access Point in Slovakia.
2. If the buyer is unsure, ask them to contact their Access Point or the Slovak PEPPOL Authority.
3. If you submit an invoice to an unregistered buyer, you'll receive a status notification indicating the recipient isn't found on the network.

   See Handle errors below.