Every order generated through Carro will be tagged one of two ways, depending on if you are acting as the retailer or the supplier.
When an order is placed from a retailer's store, the order will appear in your normal orders queue and will be tagged as a "Carro Retailer Order".
Shopify also provides the option to filter orders by tags, making it very easy to identify orders generated through Carro.
The retailer's information and Order # are included in the "Additional Details" section.
The order is placed on your store as a wholesale order, with the retailer's portion deducted according to your revenue split.
You can fulfill the order like you would any other.