Use the Dynamo Server Admin to configure the InStorePaymentGroup to display the Cash payment group. Run the following XML operation tag on the /atg/commerce/order/OrderRepository component to identify the payment group as cash. In this example, pg1900020 is the payment group ID.

Note that the CashPaymentGroup is not included in the PaymentGroupDroplet.

atg/commerce/order/OrderRepository
<update-item item-descriptor="paymentGroup" id="pg1900020">
  <set-property name="paymentGroupClassType" value="cash"/>
  <set-property name="paymentMethod" value="cash"/>
</update-item>