Auto-block IP from high-risk orders at checkout (for Shopify Plus)

Overview

When an order is flagged as high-risk, Blockify will automatically add that order's IP address to the Block Checkout Access list — preventing the same IP from completing checkout again.

How to use:

Make sure the Fraud Filter app is enabled.

On the Block Checkout screen, in the Quick Setup section, tick the box "Auto-block IP from high-risk orders at checkout".

Once enabled, any order flagged as high-risk will have its IP address automatically added to the Block Checkout Access list with:

• Source: Auto – #[Order number]
• Status: Enabled (ON)

Visitors accessing checkout from a blocked IP will be prevented from completing their order.

Once the IP is blocked, visitors using that IP will see an error message on the checkout page:

"Unfortunately, you won't be able to complete checkout."

You can customize this message for each rule by editing the Error message field in the rule's detail page.

Notes:

• Only orders that have an IP address recorded will be added to the block list. Orders without an IP will be skipped.
• This feature only applies to high-risk orders placed after the setting is turned on. Existing high-risk orders will not be retroactively added.

Updated on: 15/04/2026