Fraud prevention playbooks

How Shopify merchants use blocklists to stop chargebacks, serial returners, and refund abuse, plus when a fraud filter is the better fit.

• How to block a customer on Shopify

  How Shopify merchants block customers, from native tools to a durable blocklist that stops repeat abusers across emails and accounts.

• Blocklist vs fraud filter: when to use each

  Shopify fraud prevention explained: when a customer blocklist beats a fraud filter or risk score, and how merchants combine both.

• How to block repeat chargeback customers with Blox

  A practical guide for Shopify merchants to stop repeat chargeback customers, serial returners, and refund abusers with Blox’s community blocklist.

Also see: Blox vs NoFraud, Signifyd, and Blockify · FAQ