Articles on: [Shopify Platform] Blockify - Fraud IP Blocker

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

Overview

Stop a fraudster from coming back to place another order. When Fraud Filters marks an order as high-risk, Auto-block IP from high-risk orders at checkout adds that order's IP address to your Block checkout access rules, so nobody can complete another checkout from that IP address. It is a single checkbox under Quick Setup on the Block Checkout page.

What you'll learn

Requirement
How to enable Auto-block IP from high-risk orders at checkout?
How it works?
Finding the rules this feature created
Who can use this feature?

Requirement

Fraud Filters must be turned on, and your store must be on Shopify Plus with the Blockify - Checkout UI block added in the checkout editor. See How to add Blockify checkout blocks in the checkout editor (Shopify Plus)?

How to enable Auto-block IP from high-risk orders at checkout?

Step 1: Open Quick Setup

Go to Block Checkout and find the Quick Setup section at the top.

Step 2: Tick the checkbox

Tick Auto-block IP from high-risk orders at checkout. The setting applies immediately.

How it works?

From then on, each time Fraud Filters marks an order as high-risk, Blockify creates a rule in the Block checkout access list with:

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

A visitor who reaches the checkout from that IP sees "Unfortunately, you won't be able to complete checkout" and the order is not created. Open the rule and edit Error message to change the text for that IP.

Blockify only adds orders that have an IP address saved; orders without one are skipped. The feature covers high-risk orders placed after you tick the box — Blockify doesn't go back and add older high-risk orders.

The feature only blocks future checkouts from the IP. What happens to the high-risk order itself (Cancel order automatically or Flag order) depends on the actions you chose in Fraud Filters.

Finding the rules this feature created

The rules are in Block Checkout > Block checkout access. Their Source column reads Auto followed by the order number, which opens the order in Shopify; rules you created yourself read Manual. The list has no Source filter; scan the Source column to find them.

You can edit or delete these rules like any other.

Who can use this feature?

Available on the Shopify Plus plan.

FAQs

Will this block a real customer?

Only if Fraud Filters marked their order as high-risk. If Fraud Filters got it wrong, delete the Auto rule for their IP from Block checkout access and they can check out again.

Does it block the visitor from browsing the store?

No. The rule only stops the checkout. To block the visitor from your whole store, use Auto-block visitors placing fraud orders or add the IP in Block & Re-director.

Why was no rule created for a high-risk order?

The order had no IP address saved, it was placed before you turned the feature on, or Fraud Filters was off at the time.

How many rules will this create?

One per high-risk order with an IP. Watch the Checkout validation usage counter on the Block Checkout page and delete old Auto rules if it turns amber.

Updated on: 16/10/2026

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