KeYouYun ERP provides a blacklist function. If the seller encounters frequent buyer returns, refunds, malicious bad reviews (unreasonable requirements, peers, etc.), suspected credit card fraud, malicious threats, blackmail, non-payment of orders, remote areas, etc. The problem caused the store to be damaged. You can mark this buyer as a blacklist, so that new orders can promptly warn malicious buyers and prevent economic damage.
The customer service management of KeYouYun ERP can manage customer relationship with buyers and suppliers.