The Online Transactions API allows you to record external sales and returns with SimpleConsign, such as those placed via an ecommerce site. Version 1 of this API only recorded sales, did not record returns, and did not record the external e-commerce order/invoice number. Version 2 of this API introduced the ability to do returns. To do returns, you must record the order/invoice number (orderNumber) on both the sale and the return. Any sale without an orderNumber cannot be returned later. The only difference between version 1 and 2 of the API is whether you include the order type and orderNumber or not. Version 1 API calls will continue to work with the Version 2 API, with the exception about returns noted above.To submit a transaction, submit a POST request to