What's the optimal solution for global shipping address validation?

Topic summary

A merchant seeks a global shipping address validation solution compatible with the standard Shopify plan (not Shopify Plus). Key requirements include:

Core Needs:

  • International address validation
  • PO box blocking capability
  • No modifications to checkout.liquid files
  • Works without Shopify Plus subscription

Recommended Solution:
Address Validify app was suggested, offering:

  • Validation for multiple fields (name, address lines, city, zip, phone, email)
  • Custom error messages in store’s active language
  • Advanced rules: missing house/apartment numbers, PO box prevention, length checks, keyword/regex matching, VAT number validation, whitespace/non-Latin character blocking
  • Plug-and-play functionality at Shopify checkout page
  • Ability to block specific zip codes without blocking entire countries

Status: The discussion presents one solution but remains open for additional merchant experiences and alternative recommendations.

Summarized with AI on November 5. AI used: claude-sonnet-4-5-20250929.

What is the best solution for Shipping Address Validation?

I am looking for a good quality app (or third-party solution to build an app) that can validate postal address globally. I have searched the app store but many of the apps available don’t seem to offer what we are looking for. The only one that comes close is Shipping Address Validator.

What we are looking for is a solution where we can validate international addresses, block PO box addresses. And something that can work on the Standard Shopify Plan - Not Shopify Plus.

I would be interested to learn what other merchants are doing to tackle this issue.

Hey @robo_04051

We have best solution of your issue,

Using Address Validify You can validate First name, Last name, Address Line 1 and Address Line 2, City, Zip Code, Phone, Customer Phone, Customer Email with Your Custom Messages Belongs to Perticular Field in Store Activate Language with various conditions like Missing House Number, Missing Apartment, Suite, etc., Prevent PO Box Address, Field Minimum/Maximum Length Checker, Keyword Matching Rule, Regular Expression Matching Rule, Missing Vat Number, Block Extra White Space, Block Non Latin word, Block Number.

Address Validify is also able to apply various validations as per Store Owner Requirements on Cart, and Block Perticular Zip code / Postal Code of any country without blocking Entier country

There is no need to have Shopify Plus plan anymore to validate shipping address at Shopify Checkout Page. and Our App is Just Plug & Play, there is no more modification in checkout.liquid file to Validate Shipping Address, Just Install Address Validify set validation rules as per your requirement, rest of all things will handled by our app.

Regards,
Devesha Solution.