More general information about Suppliers is provided in the Suppliers topic.
Example

<Invoice>
    <!-- code omitted for clarity -->
    <cac:AccountingSupplierParty>
        <cac:Party>
            <cac:PartyIdentification>
                <cbc:ID schemeID="0088">7300010000001</cbc:ID> Ⓐ 
            </cac:PartyIdentification>
            <cac:PartyName>
                <cbc:Name>Supplier Trading Name Ltd.</cbc:Name> Ⓑ 
            </cac:PartyName>
            <cac:PostalAddress> Ⓒ 
                <cbc:StreetName>Main street 1</cbc:StreetName>
                <cbc:AdditionalStreetName>Postbox 123</cbc:AdditionalStreetName>
                <cbc:CityName>London</cbc:CityName>
                <cbc:PostalZone>GB 123 EW</cbc:PostalZone>
                <cbc:CountrySubentity>West London district</cbc:CountrySubentity>
                <cac:AddressLine>
                    <cbc:Line>Third address line</cbc:Line>
                </cac:AddressLine>
                <cac:Country>
                    <cbc:IdentificationCode>GB</cbc:IdentificationCode>  
                </cac:Country>
            </cac:PostalAddress>
            <cac:PartyTaxScheme> Ⓓ
                <cbc:CompanyID>GB76576657</cbc:CompanyID>
                <cac:TaxScheme>
                    <cbc:ID>VAT</cbc:ID>  
                </cac:TaxScheme>
            </cac:PartyTaxScheme>
            <cac:PartyLegalEntity> Ⓔ 
                <cbc:RegistrationName>Supplier Official Name Ltd.</cbc:RegistrationName>  
                <cbc:CompanyID>GB983294</cbc:CompanyID>  
            </cac:PartyLegalEntity>
            <cac:Contact> Ⓕ
                <cbc:Name>John Doe</cbc:Name>
                <cbc:Telephone>9384203984</cbc:Telephone>
                <cbc:ElectronicMail>[email protected]</cbc:ElectronicMail>
            </cac:Contact>
        </cac:Party>
    </cac:AccountingSupplierParty>
    <!-- code omitted for clarity -->
</Invoice>