One company can use more Peppol ID?
Short answer
Technically, they can Peppol there are different participant identifiers, but in Slovakia e-invoice is not recommended for any clear reason. For Slovak entities, the key is tax identification number in scheme 0245. More admission identifiers can only help in specific cases (groups of companies, different legal/tax entities, foreign registrations), otherwise they will cause confusion in delivery, accounting and archives. It is important not to confuse it with the possibility of having more contracted postmen to send, which is common and supported.
Mail for sending ≠ Peppol ID for receiving
The company can have more when sending e-invoicing delivery-service provider The selection is a matter of configuration of the accounting system. However, this is not the same as having more participant identifiers to receive; for a given ParticipantID, only one poster listed in the SMP is registered for admission.
Groups of companies, multiple entities
For example, for different legal/tax entities, foreign registrations or where it is clearly documented which identifier belongs to which entity and process.
Branches, centres, projects
If only internal organisational units of one legal person are concerned, it is usually better to use one correct participant's identifier and direction to deal internally with the accounting system or ERP.
Business Wrong Way
A partner may send the invoice to a technically existing identifier, but a business wrong path - incorrect acceptance, late booking, duplicate archive.
Conclusion
Not legal advice. Machine-translated answer, not yet manually reviewed. For the exact wording, see the Slovak original.