<PaymentDetailsInformation xmlns="https://www.tricommerce.co.uk/xGate/PaymentDetailsInformation.xsd">
  <PaymentDetails>
    <PaymentMethod>Existing Account</PaymentMethod>
    <ExistingAccountDetails>
		<AccountCode>ABCDE123</AccountCode>
    </ExistingAccountDetails>
  </PaymentDetails>
</PaymentDetailsInformation>