---
title: "PO Box Shipping Carrier Guard Shopify App Profile"
description: "UPS, FedEx, DHL and other couriers can't deliver to PO boxes, so those orders bounce back or need a costly fix. PO Box Shipping Carrier Guard checks the address at checkout and asks for a street address when the chosen shipping option can't reach a PO box. Choose which of your shipping options go by mail, like USPS, and customers can still use a PO box with those. Prefer no PO boxes at all? Block them everywhere. Setup takes a minute, with no code or theme changes."
canonical_url: "https://shoplist.co/shopify-apps/po-box-shipping-carrier-guard"
markdown_url: "https://shoplist.co/shopify-apps/po-box-shipping-carrier-guard.md"
last_updated: "2026-11-11"
entity_type: "shopify_app"
slug: "po-box-shipping-carrier-guard"
source: "public Shopify app profile allowlist"
---

# PO Box Shipping Carrier Guard Shopify App Profile

> UPS, FedEx, DHL and other couriers can't deliver to PO boxes, so those orders bounce back or need a costly fix. PO Box Shipping Carrier Guard checks the address at checkout and asks for a street address when the chosen shipping option can't reach a PO box. Choose which of your shipping options go by mail, like USPS, and customers can still use a PO box with those. Prefer no PO boxes at all? Block them everywhere. Setup takes a minute, with no code or theme changes.

## Quick answer
PO Box Shipping Carrier Guard has 0 detected stores in Shoplist. This Markdown profile displays 0 public brand examples; it is not a complete customer list.

## Key facts
- Name: PO Box Shipping Carrier Guard
- Monitoring status: First-adopter watch
- Developer: David Warwick
- Developer profile: https://shoplist.co/app-developers/david-warwick
- Shopify App Store URL: https://apps.shopify.com/po-box-shipping-carrier-guard
- Launch date: November 11, 2026
- Shoplist category: Shipping & Fulfillment

## Pricing summary
Free

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
- Blocks PO box addresses at checkout for courier shipping options
- Allows PO boxes with USPS and other mail services you choose
- Finds your shipping rates and suggests which ones ship by mail
- Block all PO boxes or allow them everywhere with one setting
- Runs as a checkout rule, with no code or theme edits
## Shopify App Store categories
- Shipping

## Data note
Profile updated: November 11, 2026. This is the profile revision date, not a guarantee that every store was checked on that date.
Public snapshot built: 2026-11-12 13:30:38.882143\+00
Public app evidence date: 2026-11-11 21:19:04.315637\+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/po-box-shipping-carrier-guard)
- [Shopify apps directory](https://shoplist.co/shopify-apps)
- [Shoplist data methodology](https://shoplist.co/data-methodology.md)