There are a variety of different documents that can be used in EDI transactions. Some of the most common include: Purchase Orders Purchase orders indicate what products or services a buyer intends to purchase from a seller. They typically include information such as the item number, quantity, price, and delivery date. Invoices Provide a record of what products or services have been delivered and how much the buyer owes the seller. Shipping Manifests It lists all of the items that are being shipped as well as their destinations. These documents are essential for ensuring that the correct products are delivered to the correct locations.