EDI 810 (Invoice) is an X12 transaction set to send billing information for rendered goods and services as per customary and established business and industry practice.

EDI 820 (Payment Order/ Remittance Advice) is an X12 transaction set to make a payment, send remittance advice, or both. EDI 820 can be used as an order or remittance advice sent to the payer to pay the payee directly from a financial institution or a third-party agent.

EDI 824 (Application Advice) is an X12 transaction set to report results after edits have been made in an application system's database. The edits made in transaction sets can be reported in the functional group, a part of the transaction set, or a different transaction set. The result can be coded or free-format. EDI 824 is only used when there is a need to report acceptance, rejection, partial acceptance, or changes in a transaction set. It is not used as a response to another transaction set.

EDI 860 (Purchase Order Change Request) is an X12 transaction set to send the information regarding the changes in a purchase order as per customary and established business and industry practice. It can be used by a buyer to request a change in the previous purchase order (EDI 850) or to confirm the changes in the purchase order requested by a seller.

EDI 846 (Inventory Inquiry/Advice) is an X12 transaction set to provide inventory information by a seller to a buyer, by a representative of a seller to that seller, and by one location to another location that is managing goods or services. It is also used to inquire about the availability of inventory without any obligations on the seller to reserve that inventory.

EDI 850 (Purchase Order) is an X12 transaction set to place a purchase order for goods or services with a vendor as per customary and established business and industry practice.