Ultimate PO Box Blocker

Block PO boxes in real-time, save time & prevent lost...

by MSM TECHNOLOGIES · Launched: October 2023

5.0 (5) on Shopify Built for Shopify

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Stop PO Box orders at checkout for successful deliveries and lower shipping cost. 1-click setup.

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About Ultimate PO Box Blocker

If you're a merchant tired of dealing with lost packages, failed deliveries, or the extra costs associated with reshipping, then Ultimate PO Box Blocker is for you.Whether you're a small business owner or run a large e-commerce operation, our app is designed to make your shipping process more efficient and reliable.The app needs no manual setup for seamless integration but offers advanced customization options. Take control of your shipping process today. Auto-block PO Boxes carriers like FedEx, UPS, DHL can't deliver to. Eliminate time, effort, cost resolving address issues after purchase. Real-time validation flags undeliverable addresses during checkout. Simple installation with seamless integration—no setup needed. Advanced options to customize settings for specific shipping needs. Show more Show less

Last verified: July 16, 2026 · Fresh

App details

Developer: MSM TECHNOLOGIES
Category: Orders & shipping
Pricing: Paid
Launched: October 2023
Rating: 5.0 (5) on Shopify

Key features

Block PO Box orders in real-time
Setup in 1 click
Customize your PO Box message
Integrate Seamlessly with Shopify
Advanced Settings at your fingertips

Integrations with:

Checkout, Shopify Admin

2 plans · 30-day free trial

Pro Monthly Plan

$8.99/month

Pro Yearly Plan

$96.99/year

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 8 Shopify App Store reviews

Use the arrows to read individual reviews

This app is very easy to set up and offers a lot of options to block shipments to PO Boxes. It has an option for blocking by product, but did not have an option for blocking by collections. When I asked Jason about this, I was amazed that in a couple of weeks he added a collections option to this app, incredible customer service!! It works perfect!

— Ridgedale Orchard & Vineyard

This app works perfectly, and it's very thorough. It blocks a wide variety of PO box entries and is fully configurable. The perfect solution to an otherwise annoying issue in Shopify. Their customer service is also very responsive and helpful. Highly recommended!!!

— Quite Cozy