Use the ThirdPartyPayment Extension to specify the details.

Elements

Element	Description
`Invoice/UBLExtensions/UBLExtension/ExtensionContent/InvoiceExtension/ ThirdPartyPayment/ID`	Specify an ID for the type of third party payment.
`Invoice/UBLExtensions/UBLExtension/ExtensionContent/InvoiceExtension/ ThirdPartyPayment/PaidAmount`	Specify an amount for the payment.
`Invoice/UBLExtensions/UBLExtension/ExtensionContent/InvoiceExtension/ ThirdPartyPayment/InstructionID`	Specify a clear description of the third party claim.

Example

<ubl:Invoice>
    <cec:UBLExtensions>
        <cec:UBLExtension>
            <cec:ExtensionContent>
                <vrbl:InvoiceExtension>
                    <!-- Code omitted for clarity -->
                    <vrbl:ThirdPartyPayment>
                        <vrbl:ID>Mobile Payment</vrbl:ID>
                        <vrbl:PaidAmount currencyID="EUR">19.96</vrbl:PaidAmount>
                        <vrbl:InstructionID>Mobile Payment (Gross receivable for third-party services)</vrbl:InstructionID>
                    </vrbl:ThirdPartyPayment>
                    <!-- Code omitted for clarity -->
                </vrbl:InvoiceExtension>
            </cec:ExtensionContent>
        </cec:UBLExtension>
    </cec:UBLExtensions>
</ubl:Invoice>