Home Checkout Blocked ABNs

Blocked ABNs

Last updated on Oct 18, 2026

The Blocked ABNs page holds ABNs your store won't accept, such as a business that charged back an order. This article covers adding and removing ABNs, and what happens when a buyer enters one.

When a buyer enters a blocked ABN

Choose what happens under When a buyer enters a blocked ABN, then press Save:

Option What the buyer sees What happens to the order
Turn the ABN away at checkout (default) Your message, and must use another ABN No details are saved
Let the order through for you to review Nothing Tag TradeCheck: Blocked ABN and a medium risk level

Message buyers see: with Turn the ABN away at checkout, write the message buyers see, up to 300 characters. Leave it blank to use the default: "This ABN can't be used for orders with this store. Contact us if you think this is a mistake."

Stopping payment: turning an ABN away removes it from the form, but a buyer inside Plus checkout can leave the ABN blank and carry on. Turn on Require a valid ABN in Settings › Step 3 to stop them paying without an ABN. See Checkout rules.

Orders with a blocked ABN

Any order saved with a blocked ABN gets the ABN is on your blocked list flag, whichever option you chose. This includes ABNs staff enter on the order page. The first time an order gets the flag, TradeCheck adds the order tag TradeCheck: Blocked ABN and a medium risk assessment that says the ABN is on your TradeCheck blocked list. Search for the tag in Orders to find these orders.

If the order's ABN changes to one that isn't blocked, TradeCheck removes the tag. The risk assessment stays on the order, because Shopify doesn't let apps delete one.

Logged-in buyers whose saved ABN is now blocked don't get it filled in at checkout.

Adding ABNs

To block one ABN, enter it under Block an ABN, add an optional note that only your staff see (up to 200 characters), and press Block ABN. TradeCheck checks the number is a valid ABN, but doesn't look it up on the ABR.

To block a list, press Bulk add:

  • Upload a CSV or text file, or paste a list.
  • Put one ABN per line, with an optional note after a comma. Spaces in ABNs and a header row are fine.
  • Add up to 5,000 ABNs at a time. Split longer lists and add them in parts.
  • The preview shows how many ABNs are ready, which lines aren't valid ABNs, and how many repeats it skipped. ABNs already on the list are skipped.

Finding, exporting and removing ABNs

The Blocked list shows the newest ABNs first, 50 per page. Search by ABN or note.

Export CSV downloads the whole list with ABN, Note and Added columns. You can upload the file again through Bulk add.

To remove ABNs, press Remove on a row, or tick rows and press Remove selected. Remove on a single row removes the ABN straight away, with no confirmation. Checkout accepts removed ABNs again.