A PunchOut or Roundtrip, also known as PunchOut Catalog or PunchOut Website is a method for B2B buyers to purchase from a supplier's website from within the buyer’s own procurement application. Usually, a buyer can easily log in to the supplier’s eCommerce website and purchase items. For a PunchOut, a buyer would log into their procurement system like SAP, Coupa, or any other, and click on a link that opens the supplier’s eCommerce store within the buyer’s procurement system. Since it uses single sign-on they do not have to sign in again and can browse through the catalog like on any eCommerce website. Once they are ready to buy, instead of placing the order with the supplier, the item is sent back to the buyer’s procurement system. They do not have to enter anything manually and the order goes through the approval workflow inside the procurement system. Once approved they can either send a PO to the supplier manually or within the same PunchOut framework. Some buyers also pull invoices from the supplier's website through a PunchOut