If the Buyer is on the PEPPOL network, you need to specify their PEPPOL ID in the Buyer Electronic Address element. This ID is a combination of a unique ID such as VAT ID and a scheme identifier from the CEF Electronic Address Scheme list here.

If you are using SMTP to send the Document via email, you still need to provide a valid address in the Buyer Electronic Address element.

Elements

Name (Technical Name)	Cardinality	Description
Buyer Electronic Address (`Invoice/AccountingCustomerParty/Party/EndpointID`)	1..1	The Buyer's electronic address ID
Buyer Electronic Address Identification Scheme Identifier (`Invoice/AccountingCustomerParty/Party/EndpointID @schemeID`)	1..1	The scheme to which the ID belongs

Examples

PEPPOL

The following is an example of a Buyer on the PEPPOL network:

<Invoice>
    <!-- code omitted for clarity -->
    <cac:AccountingCustomerParty>
        <cac:Party>
            <!-- Peppol ID: combination of schemeID and unique party ID -->
            <cbc:EndpointID schemeID="9930">DE123456789</cbc:EndpointID>
            <!-- code omitted for clarity -->
        <cac:Party>
        <!-- code omitted for clarity -->
    </cac:AccountingCustomerParty>
    <!-- code omitted for clarity -->
</Invoice>

ID unavailable

The following is an example where the Buyer ID is not known. n/a is used instead:

<Invoice>
    <!-- code omitted for clarity -->
    <cac:AccountingCustomerParty>
        <cac:Party>
            <!-- Peppol ID: combination of schemeID and unique party ID -->
            <cbc:EndpointID schemeID="9930">n/a</cbc:EndpointID>
            <!-- code omitted for clarity -->
        <cac:Party>
        <!-- code omitted for clarity -->
    </cac:AccountingCustomerParty>
    <!-- code omitted for clarity -->
</Invoice>