---
title: "King Checkout Validation Shopify App Profile"
description: "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."
canonical_url: "https://shoplist.co/shopify-apps/king-checkout-validation"
markdown_url: "https://shoplist.co/shopify-apps/king-checkout-validation.md"
last_updated: "2026-09-19"
entity_type: "shopify_app"
slug: "king-checkout-validation"
source: "public Shopify app profile allowlist"
---

# King Checkout Validation Shopify App Profile

> 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.

## Quick answer
King Checkout Validation has 0 detected stores in Shoplist. This Markdown profile displays 0 public brand examples; it is not a complete customer list.

## Key facts
- Name: King Checkout Validation
- Monitoring status: Storefront detection limited
- Developer: Lightcone
- Developer profile: https://shoplist.co/app-developers/gordon-kihn
- Shopify App Store URL: https://apps.shopify.com/king-checkout-validation
- Launch date: March 15, 2024
- Shoplist category: Marketing Automation
- Rating: 4.9
- Review count: 24
- Free plan signal: Yes
- Free trial signal: Yes

## Pricing summary
Free: 0; Basic: 4.99; Premium: 9.99

Shoplist has not yet found reliable public storefront evidence connecting a Shopify store to this app. This does not mean the app has no users. Some apps are new, admin-only, server-side, theme-independent, or otherwise difficult to detect from public storefront signals.


## Public callouts
- Verifies presence of house/apartment number in addresses
- Validates completion of customer's VAT number \(Tax exemption\)
- Filters out Post Office \(PO\) Box addresses
- Field Length Validation, Custom Keyword and Regular Expression Validation
- Customize validation rules based on combinations of order amount, weight, etc
## Shopify App Store categories
- Order limits

## Data note
Profile updated: September 19, 2026. This is the profile revision date, not a guarantee that every store was checked on that date.
Public snapshot built: 2026-09-19 11:15:49.940772\+00
Detection metrics refreshed: 2026-10-12 05:10:00.06035\+00
Public app evidence date: 2026-09-19 07:52:26.93166\+00
This generated Markdown profile intentionally exposes only public, stable app-profile fields and a small public app-stack sample from Shoplist. It excludes private contact data, people data, internal scores, crawl provenance, full datasets, and unstable operational fields.

## Related links
- [HTML app profile](https://shoplist.co/shopify-apps/king-checkout-validation)
- [Shopify apps directory](https://shoplist.co/shopify-apps)
- [Shoplist data methodology](https://shoplist.co/data-methodology.md)