Know your problem customers before you dispatch their order.

Flag the customers who damage, return late, or never come back. Catch them even when they change their details.

Alert only. It never blocks, holds, or changes an order. Your team always has the final decision.
★★★★★ on the Shopify App Store
Shopify orders list with risk flags from Blacklist Customer

How it works

Set it up once. Then every order is checked automatically going forward.

1

Add a flagged customer

Record anyone who has caused damage, returned late, charged back, or stolen from you. Add them by name, email, phone, or address. Any combination works.

2

Staff are alerted automatically

When a matching order arrives, a clear risk flag appears on the order with the reason, severity, and incident history.

3

Your team makes the call

Orders are never blocked automatically. Staff see the recommended action (require ID, take a deposit, or decline) and decide for themselves.

See it in action

A clear risk flag inside the order, or a green all-clear. Your staff see it exactly where they work.

Shopify order page showing a flagged customer with match details
Flagged customer The order shows what matched, the severity, the recommended action, and incident history, right inside the order.
Shopify order page showing a cleared customer
Clear customer No match shows a simple green all-clear, so staff know it is fine to proceed.
Blacklist Register showing flagged customers
Blacklist Register Your full list in one place. Search, edit, and bulk import flagged customers, and set severity for each.

Built for hire & rental businesses

If you lend it out and expect it back, this is for you.

Flags customers who change and mask their details

Changed their name or email but reused a phone number or address? They are still flagged. Matching works on every field independently.

🔔

Instant risk flag on the order

A colour-coded panel appears right inside the order: Watch, Warn, or Do Not Fulfil, with the full reason and history.

📒

Incident history per customer

Log damage, late returns, stolen goods and notes against each person, so staff see the whole story at a glance.

Email alerts (Pro & Business)

Get notified by email the moment a flagged customer places an order, even when you are away from the admin.

📥

Bulk import your list

Already keep a list in a spreadsheet? Import it as a CSV and you are protected from day one.

🛡

Safe by design

Read-only and isolated from your store. It cannot break your storefront, checkout, or other apps. Uninstalling leaves everything as it was.

What merchants say

Hire and rental businesses protecting their orders every day.

★★★★★
Since owning a dress hire business, I have been looking for years for an app like this, and I am so glad something like it finally exists. It is a game changer for hire businesses. One of the biggest challenges we face is customers returning items late and then continuing to place new bookings without any visibility of their previous behaviour. This app allows us to identify those customers and make more informed decisions, whether that is declining future bookings or requiring an additional security deposit. I would highly recommend it to any hire business or other like-minded businesses looking for a way to flag and manage difficult customers more effectively.
EllieDress Hire AU — Australia's largest physical dress hire store

One bad customer pays for a year.

No lock-in. Cancel anytime.

Monthly Yearly 20% off
Starter
Up to 250 orders/month
$9.99
/mo
Get started
  • Up to 250 orders/month
  • Build your customer risk register
  • Automatic flag on every matching order
  • Incident history per customer
  • Bulk import via CSV
7-day free trial
Growth
Up to 1,000 orders/month
$19.99
/mo
Get started
  • Up to 1,000 orders/month
  • Everything in Starter
  • Choose which fields to match on
  • Find any flagged customer instantly
  • Add notes to flagged customers
  • Audit log — see who reviewed a flagged order
7-day free trial
Pro
Popular
Up to 5,000 orders/month
$39.99
/mo
Get started
  • Up to 5,000 orders/month
  • Everything in Growth
  • Customise severity levels
  • Multiple staff can add to the register
  • Email alert when a flagged customer orders
7-day free trial
Business
Up to 20,000 orders/month
$79.99
/mo
Get started
  • Up to 20,000 orders/month
  • Everything in Pro
  • Multiple email alert recipients
  • Priority support
  • Onboarding assistance
7-day free trial

Need more than 20,000 orders a month? Contact us for custom pricing.

Common questions, straight answers.

Will it interfere with my store or break anything?

No. It never blocks, holds, cancels, edits, or fulfils orders. It does not touch your theme or checkout, so it cannot affect what shoppers see or their ability to buy. Orders flow exactly as before.

Will it affect my other apps, like my booking or rental app?

No. Shopify apps run independently and one cannot modify or break another. Blacklist Customer does not create orders, so it will not change your order sources or interfere with your booking or rental engine. It simply adds a risk-check panel to the order page.

Does it automatically cancel risky orders?

Never. Your team always decides. The app surfaces who is flagged, why, and a recommended action. The call is always yours.

What happens if I uninstall it?

Your store is left exactly as it was. Uninstalling removes the app's access and its data. It does not alter your orders, products, customers, or other apps.

How does it match customers who change their details?

It checks name, email, phone, and address independently. So a customer who changes their name but reuses a phone number or delivery address is still flagged.

Which plan do I need?

Start with Starter if you are processing under 250 orders a month. Move to Growth if you want to search your register or customise which fields trigger a match. Pro adds email alerts so you are notified even when you are not in the admin. Business suits high-volume stores with multiple staff who need separate alert recipients.

Stop getting caught twice.

Add Blacklist Customer to your store and protect every order from day one.

Add to Shopify — free trial