You can use the Payment Terms tab to specify the payment terms for the order.
The "Customer Order (create)" form. The Payment Terms tab
The Payment Terms field is auto-populated with the default payment terms specified in the customer contract. If needed. select another terms that were agreed on with the customer; then, the system will automatically recalculate the amounts due for each installment. Also, you can edit these amounts manually in the table. The table total must be equal to the document total amount.
You can select one of the following payment types: Cash, Non-Cash, Unknown. The Unknown payment type is selected by default.
To include planned payments from the customer in the payment calendar as planned payments of the selected payment type, select the Add to Payment Calendar option. This option is available if the Cash Flow Forecasting option is selected on the Administration > Settings > Money form.
The Block Supplying and Block Shipping columns can be used to prohibit creating any Purchase Order and Invoice documents for this customer order, if the customer did not complied with the credit terms of your company.
By default, these columns are populated from the same-name columns of payment terms.