Demfilz ABN Lookup for WooCommerce

No. Without one the plugin still refuses mistyped and made-up numbers, because an ABN contains two check digits. With a GUID it also knows whether the ABN is active, who holds it and whether they are registered for GST. Registration with the Australian Business Register is free.

The number has 11 digits and its check digits add up, so it could be an ABN. It does not mean the ABN has been issued or is still active. Only a lookup tells you that.

The order goes through. The ABN still gets the check digit test, the order screen shows "Not checked" with the reason, and Check again asks the register when you are ready. After a failed request the plugin waits a minute before trying again, so a slow register does not slow your checkout.

Yes. Choose "Look it up, and refuse ABNs that are cancelled or not on the register". The customer sees the reason under the field and when they try to place the order.

Yes. Set the ABN field to "Required when a company name is given". Customers who fill in Company must give an ABN; everyone else can leave it empty. (The Company field has to be shown in your checkout for this.) Or make the field optional.

No. In Australia an ABN does not make a sale GST-free, so this plugin never changes tax. The ABN is for your records, your tax invoices and your trade terms.

A tax invoice for a sale of $1,000 or more has to show the buyer's identity or ABN. Tick "Add the ABN as the last line of the order's billing address" and the ABN is printed wherever the billing address is, which covers order emails and most PDF invoice plugins. Check a sample invoice from your own invoice plugin after switching it on.

The Australian Business Register sends it by email after you register, which is not always instant. Until you paste it in, the field works with the check digit test.

On the order screen, in order emails, on the order received and View order pages, and in My Account → Account details. Tick "Add the ABN as the last line of the order's billing address" to print it wherever the billing address is printed, which includes most PDF invoice plugins.

If the field is called billing_abn, no: this plugin uses the same order meta (_billing_abn) and customer meta (billing_abn). Remove the old field so it is not shown twice.

No. It is stored in your settings and used only by your server. The checkout asks your store about an ABN, and your store asks the register.

Live lookups are limited to 20 an hour per IP address and 300 an hour across all visitors, numbers that fail the check digit test are never sent, and answers are cached. The check made when an order is placed has its own allowance (300 new ABNs an hour), so a visitor who uses up the live lookups cannot switch off the check on orders. When an allowance is used up the ABN is marked "not checked" on the order, where you can check it again. The limits can be changed with the dabn_rate_limit, dabn_rate_limit_site and dabn_rate_limit_orders filters.

Yes, with the checkout block and the classic checkout shortcode, and with both order storage modes.

The lookup tool accepts an ACN and shows the company's ABN record. The checkout field is for ABNs only. NZBNs are not supported.

They stay on your orders and customer accounts. Cached register answers are deleted; the settings are deleted only if you tick the Uninstall box.

No. It is an independent plugin by demfilz. It is not affiliated with, endorsed by or supported by the Australian Business Register, the Australian Taxation Office or any other government agency. ABN Lookup data is supplied by the register "as is"; check the public record when a decision depends on it.

Not yet. Until it is published on the official WordPress.org plugin directory, download the plugin zip from this page and upload it under Plugins, Add New Plugin, Upload Plugin.