Yes, because access to the Peppol network goes through Access Points from certified service providers (like Billit). To get access to such an Access Point, you need to verify your identity. Exchanging documents via Peppol is a lot safer than via email which is very susceptible to invoice fraud and internet crime (such as phishing, malware or ransomware).
More info can be found in our blog: Is e-invoicing via Peppol secure?