Block serial returners and chargeback abusers by email, phone or address. A hard blocklist that works in checkout, with smart matching and auto-cancel.

• Hard checkout block by email, phone or address — works in express checkout too
• Smart matching: Gmail aliases, phone prefixes and typos cannot dodge the list
• Auto-cancel with refund for orders that slip through the checkout block
• One-click „block from order #” plus CSV import of existing lists
• Neutral decline message — buyers never learn they are listed (GDPR-safe)