PO Box Blocker Pro

Pricing: From $2.99/month. Free trial available.
Rating: 1.0 (1)
Developer: Dev Kit

Install

PO Box blocked during Shopify checkout with a custom message

Block PO boxes, lockers & undeliverable addresses at checkout

PO Box Blocker Pro checks each shipping address at checkout and blocks addresses you can't deliver to before the order is placed. Block PO boxes, parcel lockers, locked bags, private bags and APO/FPO addresses, or restrict delivery by country, state, city or postal code. Allow chosen products, variants or collections to bypass the rules, set a custom checkout message, and test any address before going live. Works on standard checkout and Shop Pay across all Shopify plans. No theme edits needed.

Block PO boxes, parcel lockers, locked/private bags & APO/FPO addresses
Restrict delivery by country, state, region, county or postal code
Allow chosen products, variants or collections to bypass any rule
Set a custom checkout message that helps shoppers fix their address
Test any address in the built-in tester before you go live

Languages

English

Works with

Checkout
Shopify Admin

Pricing

Choose the plan that best fits your business.

Essential

$2.99 / month

Features

Real-Time PO Box Blocking
Works on checkout & Shop Pay
Custom checkout message
Built-in address tester
Auto health checks & self-repair
Unlimited orders and validations
Block addresses FedEx, UPS & DHL reject
One-click automatic setup

14-day free trial

Pro

$4.99 / month

Features

Everything in Essential
PO boxes, lockers, bags & APO/FPO
Rules by country, state, city & postal
Exempt products, variants, collections
Priority email support
Unlimited orders and validations

14-day free trial

All charges are billed in USD. Recurring and usage-based charges are billed every 30 days.

Reviews (1)

Overall rating

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0% of ratings are 2 stars
100% of ratings are 1 stars
1

All reviews

September 10, 2025

does not work

Movement Assessment Technologies

Australia

About 11 hours using the app

Dev Kit replied September 16, 2025

Update - July 2026

Hi there,

Thank you again for sharing this feedback. Since your review, PO Box Blocker Pro has been completely rebuilt using Shopify’s latest server-side checkout validation system.

The app now blocks PO Box addresses across all Shopify plans, including standard checkout and Shop Pay.

Your feedback helped us identify an important gap and directly influenced this major upgrade. We’d be happy to help you test the updated version should you decide to try it again.

Thank you for helping us improve PO Box Blocker Pro.