Stop failed deliveries before they ship
4.9 ★ (44 reviews) · Shopify App Store
Catch bad addresses at checkout: missing house numbers, invalid postal codes, P.O. Boxes, and special characters, so every package arrives the first time.
Built for ShopifyCatch errors in real time
Addresses are validated the moment a customer enters them, before the order is placed.
Works on every Shopify plan
Professional address validation for all Shopify stores, not locked behind Shopify Plus.
Covers express checkout too
Validates addresses from PayPal Express, Google Pay, and Apple Pay so nothing slips through.
Features
Express Checkout Validation
Validate addresses from express checkout methods like PayPal Express, Google Pay, and Apple Pay. No address slips through unchecked.
House Number & Street Validation
Block users from checkout without a house number and/or without a street name. Catch incomplete addresses before they become failed deliveries.
P.O. Box Blocking
Block all P.O. Boxes with professional checkout validation and address validation. Prevent orders from shipping to undeliverable P.O. Box addresses.
Special Character Blocking
Block users when the address contains non-Latin or special characters that cause delivery issues with certain carriers. Prevent problems before they happen.
Works on All Shopify Stores
Works on all Shopify stores, not just Shopify Plus stores. Every merchant gets access to professional address validation at checkout.
ZIP/Postal Code Validation
Ensure ZIP and postal codes match the expected format for the destination country. Block invalid or suspicious postal codes at checkout.
How it works
Install the app
Add Address Ninja to your store. It integrates with your checkout automatically, no theme edits needed.
Choose your validation rules
Enable house-number checks, P.O. Box blocking, postal-code validation, and more with a few clicks.
Ship with confidence
Bad addresses are blocked before orders are placed, cutting failed deliveries and return costs.
Reviews
Merchants love how it catches address errors before they ship, works with every checkout flow, and has support that responds within hours.
“Provides many options for restricting data entry for address, name, email, etc. This helps us as we integrate our Shopify data across systems that have more restrictive rules than Shopify does. The company is easy to work with and responsive to requests for help or changes.”
“Moving from the custom checkout validations we had in place on checkout.liquid to Shopify's new checkout extensibility, we needed a solution that could achieve the same level of customization we previously had in place. Address Ninja was super easy to set up and their support team was top-notch as well.”
“Great app, highly recommended! And the live chat customer service has always been fantastic.”
Pricing
Try free for 14 days.
Starter
- House Number check
- P.O. Box check
- Apartment Suite check
- Special Characters check
- MeinEinkauf.ch check
- ZIP/Postal Code Format check
- ZIP/Postal Code Block check
Guides & videos
Learn more about using Address Ninja on your Shopify store.
Guides
How to Require Complete Addresses on Shopify Checkout (Apartment Numbers and PO Boxes)
Missing apartment numbers cause failed deliveries. Learn how to require Address Line 2 on Shopify & block PO Boxes without hurting conversion.
Read guide →Compare the 5 Best Shopify Address Validation Apps (2025 Review)
Compare the best Shopify address validation apps to find one that prevents failed deliveries and improves checkout accuracy.
Read guide →Why Every Shopify Store Needs Address Validation
Discover how address validation saves money, prevents failed deliveries, and keeps your customer data clean.
Read guide →How to Add Address Validation on Shopify (Native Options vs. Apps)
Learn how to add address validation to your Shopify store using native features or an app like Address Ninja, and why using an app is better.
Read guide →What Is Shopify Address Validation? How It Prevents Failed Deliveries
Learn how Shopify address validation apps verify addresses before checkout to stop failed deliveries, chargebacks, and shipping errors.
Read guide →