844 and 849 are chargeback request and chargeback reconciliation. 845 is a contract pricing and membership document. A nice description of 844 and 849 is here:https://relasoft.net/edi-844-chargeback-what-is-it/Regards,Alexander

The importance of chargebacks to wholesaler probably varies between industries. Pharmaceutical chargebacks may amount to 10-30% to the whole cost of the product! This makes chargeback validation critical to both wholesalers and manufacturers. A nice...