Provides more context about an order that is represented by an Order Reference object.
The merchant-specified identifier of this order. This is shown to the buyer in their emails and transaction history on the Amazon Pay website.
Although it is recommended, Amazon does not require this value to be unique.
Amazon recommends that you use only the following characters:
The identifier of the store from which the order was placed. This overrides the default value in Seller Central under Settings > Account Settings. It is shown to the buyer in their emails and transaction history on the Amazon Pay website.
Any additional information that you want to include with this order reference.