Go to Address Ninja in your Apps section. Click Set Maximum Character Count per Field. Choose the fields and enter the maximum number of characters allowed. Click Activate. Customize the error message if needed.
Originally from our Help Center
How do I set a maximum character count per field with Address Ninja?
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Read article →How do I block specific ZIP / postal codes with Address Ninja?
In your Shopify admin, go to Apps and open Address Ninja. Click ZIP / Postal Code Block. Search and add the countries where you want to block specific ZIP.
Read article →How do I validate ZIP / postal code formats with Address Ninja?
From your Shopify admin, open Address Ninja and click ZIP / Postal Code Format Validation. Search and add the countries where you want to enforce proper ZIP / postal code formatting.
Read article →Can I allow addresses in regions with unusual formats to bypass validation with Address Ninja?
No. There is no way to bypass validation for specific regions or customers at this time.
Read article →Can I run validation on Phone number with Address Ninja?
Not right now. Phone number validation isn’t available yet, but it’s on our list of requested features.
Read article →Ready to get started?
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Install Address Ninja on Shopify