How to Set Up Address Ninja

Install Address Ninja from the Shopify App Store, then follow the steps below to go live.

1. In Shopify admin, go to the Address Ninja app.
2. Click the validation rules you want to enforce at checkout.
3. If the rule asks for any required fields (e.g., select countries), fill them in before you click Activate.
   • For Validate Based on Custom REGEX, you can click Presets to use a ready-made pattern.
4. Click Activate to enable the rule.
5. Click Save at the top of the page.

That's it — the rule is now live at checkout.