SITE_ORDER_INVOICE_MANAGE SITE Endpoint
  /rpc/site/?method=SITE_ORDER_INVOICE_MANAGE  
  Note: This currently is not a full manage method. It can only be used to create an Invoice, not modify or delete. To do any of these, see FINANCIAL_INVOICE_MANAGE.  
  PARAMETERS TYPE  
  CreateReceipt Text (1) Y/N. If set to 'Y' will create a matching receipt
  InvoiceDescription Text (2000)  
  InvoiceSentDate Date Defaults to today
  Order Numeric Mandatory
  ReceiptPaymentMethod Numeric You can define your own, or use the defaults: 1=Cheque,2=Visa or Mastercard,3=Direct Debit,4=BPay,5=American Express,6=Cash,7=[Unknown],8=Direct Credit,101=Paypal,102=EFTPOS,103=Trade Account
  ReceiptPaymentReference Text (25)  
  RETURN  
  invoice Id of created Invoice
  receipt Id of created Receipt
  EXAMPLE
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