King Checkout Validation
Block checkout with address validation and order limits
by Gordon Kihn · Launched: March 2024 · Free plan available.
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About King Checkout Validation
Use checkout validation to check shipping and billing address fields before orders are placed. Block PO boxes, require house or apartment numbers, and check postcode/ZIP, email and VAT/tax ID formats. Match phone country codes to address countries. Set order limits by cart amount, quantity or weight, with conditions for products, customer tags and countries. Use keyword, regex and field-length checks. Show localized error messages so shoppers can fix issues and continue checkout.
Last verified: October 26, 2026 · Fresh
App details
- Developer
- Gordon Kihn
- Category
- Marketing & conversion
- Pricing
- Free plan available
- Launched
- March 2024
- Rating
- 5.0 (20) on Shopify
Key features
- Free for development stores
- Create and test validation rules
- Live chat and email support
- Require house, apartment or suite number
- Require VAT numbers
Checkout Shopify Admin
3 plans · starts free · 7-day free trial
Free
$4.99/month
$9.99/month
Plans and prices as listed on the Shopify App Store.
Ratings & reviews
Overview 1 / 20