Generally, you are required to include the Post Code, City and Country as a minimum.

Use the Party sub-element of the AccountingSupplierParty element to model this information.

Elements

Element	Description
`Invoice/AccountingSupplierParty/Party/PostalAddress/StreetName`	The first line of the address.
`Invoice/AccountingSupplierParty/Party/PostalAddress/AdditionalStreetName`	The second line of the address.
`Invoice/AccountingSupplierParty/Party/PostalAddress/CityName`	The Supplier's city.
`Invoice/AccountingSupplierParty/Party/PostalAddress/PostalZone`	The post code.
`Invoice/AccountingSupplierParty/Party/PostalAddress/CountrySubentity`	The state or province of the seller.
`Invoice/AccountingSupplierParty/Party/PostalAddress/AddressLine/cbc:Line`	Seller address line 3
`Invoice/AccountingSupplierParty/Party/PostalAddress/Country/IdentificationCode`	ISO code for country

Example

<ubl:Invoice>
    <!-- Code omitted for clarity -->
    <cac:AccountingSupplierParty>
        <cac:Party>
            <!-- Code omitted for clarity -->
            <cac:PostalAddress>
                <cbc:StreetName>[Seller address line 1]</cbc:StreetName>
                <cbc:AdditionalStreetName>[Seller address line 2]</cbc:AdditionalStreetName>
                <cbc:CityName>[Seller city]</cbc:CityName>
                <cbc:PostalZone>12345</cbc:PostalZone>
                <cac:AddressLine>
                    <cbc:Line>[Seller address line 3]</cbc:Line>
                </cac:AddressLine>
                <cac:Country>
                    <cbc:IdentificationCode>DE</cbc:IdentificationCode>
                </cac:Country>
            </cac:PostalAddress>
            <!-- Code omitted for clarity -->
        </cac:Party>
    </cac:AccountingSupplierParty>
    <!-- Code omitted for clarity -->
</ubl:Invoice>