King Checkout Validation
Validates cart, address, customer info. Implements VAT, house number, apartment checks, length checks, smart matching. reduces returns. Defines shopping future.
About King Checkout 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. All charges are billed in USD. Recurring and usage-based charges are billed every 30 days. Incredible service. Had the app for 5 minutes, and needed a custom feature/rule which wasn't included. Gordon from support created my new feature within 30 min. This app really saved us. We have an integration with SAP, and some fields have character limits that can’t be changed. This app solved that issue, and we also used it to block sending orders to certain islands via ZIP code rules — which works perfectly. I highly recommend this app. We’re running it on eight stores now. Very nice app - and especially very good and fast support. Thanks. Baoan district, Shenzhen, GD, 510000, CN This app needs access to the following data to work on your store. Learn why in the developer's privacy policy . Name, email address, phone number, physical address Meets our highest standards for performance, design, and integration. Learn moreOpens in new window Meets our highest standards for performance, design, and integration. Learn moreOpens in new window
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Key Features
Pros & Cons
Pros
Cons
Pricing
Free Free Features Free of charge for development store Creating rules in test status
Quick Info
- Category
- Marketing
- Platforms
- Shopify
- Rating
- 5.0
- Last Updated
- 2026-03-19
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