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Stop failed deliveries by blocking PO boxes, lockers and restricted locations at checkout.
Stop failed deliveries before they happen. PO Box Blocker Pro validates shipping addresses at checkout across all Shopify plans, including standard checkout and Shop Pay. Block PO Boxes, Parcel Lockers, Locked Bags, Private Bags and APO/FPO addresses, or restrict delivery by country, state/region, county, ZIP code or postal code. Add product, variant or collection exceptions, customize checkout messages and test addresses before going live. No theme edits required.
- Block PO Boxes, lockers, bags, APO and FPO addresses at checkout
- Restrict delivery by country, state, region, county or postal code
- Allow selected products, variants or collections to bypass rules
- Customize checkout messages and test addresses before going live
- Protect standard checkout and Shop Pay on every Shopify plan
Languages
English
Works with
- Checkout
- Shopify Admin
Categories
Pricing
Choose the plan that best fits your business.
Pro
$2.99 / month
Features
- Real-Time PO Box Blocking
- Bypass Specific Products
- Fully Customizable Checkout Alert
- One-Click Enable/Disable
- No Theme Edits Required
7-day free trial
All charges are billed in USD. Recurring and usage-based charges are billed every 30 days.
Reviews (1)
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0% of ratings are 5 stars
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0% of ratings are 4 stars
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0% of ratings are 3 stars
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0% of ratings are 2 stars
- 100% of ratings are 1 stars
does not work
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.
Support
App support provided by Dev Kit.
Data access
This app needs access to the following data to work on your store. Learn why in the developer's privacy policy .
View customer data:
Sensitive data
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Sensitive data
Physical address
View staff and contributor data:
Store owner
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Store owner
Name, email address, phone number, physical address
View and edit store data:
Customers, products, Online Store, custom data
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View customers
Customer data
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Edit products
Products, collections
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Edit Online Store
Theme
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Edit custom data
Metaobject definitions, metaobjects
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