The Aelia Blacklister plugin lets you block unwanted or suspicious customers from placing orders in your WooCommerce store. You can set rules to refuse orders based on things like name, email address, phone number, IP address, or physical address. When someone tries to order and matches one of your “blacklist” rules, checkout is stopped and a custom error message shows instead. It’s a great way to reduce fraud, spam, and abuse while keeping control of who can shop at your store.