Is it possible able to add items to an order that has not shipped out?

Certain companies allow items to be added to an order that hasn't shipped out, while others don't allow the products in an order to be modified after the checkout process. For companies that don't allow modifications, the customer may be able to cancel the order and place a new order.

Order processes vary based on the company. Orders typically begin in a processing status, where the order information is transmitted to the company or product distributor. After being processed and prepared, the order is shipped. For orders with multiple items, the company may send multiple shipments.

Order shipment is a standard cut off time for order modification, but this also varies for each company.