App Overview
King Checkout Validation enhances your Shopify store's checkout process by ensuring data accuracy and compliance. It automatically detects missing house or apartment numbers, blocks PO Box addresses, validates VAT/tax IDs, enforces field limits, and blocks non-Latin characters. With customizable rules based on order characteristics like value and weight, all managed in a single dashboard, the app streamlines compliance, reduces return rates, and prevents delivery issues through real-time validation.
Screenshots

Block checkout errors and enforce checkout validation with real-time address validation
Our app blocks invalid checkouts by detecting missing house/apartment numbers, validating VAT/tax ID formats, and filtering non-Latin characters. Customize address validator rules for field lengths, keyword restrictions, or regex patterns—adapting checks to cart value, product types, and shipping zones. Streamline compliance, reduce return rates, and prevent failed deliveries through automated error blocking—all managed in one dashboard.
Key Features
- Block invalid checkouts with real-time validation checks
- Auto-detect missing house/apartment numbers, block Post office (PO) Box address
- Validate fields base on keywords and regular express
- Block non-Latin chars & enforce field limits
- Customize validation rules based on combinations of order amount, weight, etc
King Checkout Validation FAQs
Yes! Try King Checkout Validation free plan. For more details about King Checkout Validation pricing, check here.

Get in Touch
with us
Whether you need more information on how LetsMetrix can help enhance your Shopify experience, or require technical support, don't hesitate to contact us. We're available 24/7 via email, phone, or live chat to ensure you have all the assistance you need.
