Privacy policy

PO Box Shipping Carrier Guard · Effective October 31, 2026

PO Box Shipping Carrier Guard ("the app") is a Shopify app made by David Warwick ("we", "us"). It stops checkout when a customer enters a PO box address and picks a shipping option that can't deliver there. This policy explains what information the app uses, why, and what happens to it.

Our role

This policy is part of the terms merchants agree to when they install the app. For their customers' information, we act only on the merchant's behalf and only to provide the app, and we follow Shopify's data protection requirements for apps.

Information about your store

When a merchant installs the app, we store:

• The store's Shopify address (for example, your-store.myshopify.com).
• The access token and permissions Shopify issues to the app, so the app's settings page can read your shipping options and save your checkout rule.

The app uses store-level access, so it doesn't collect the names or email addresses of you or your staff.

To show your shipping options on the settings page, the app reads their names from your shipping settings each time the page opens. They aren't saved on our server. The choices you make on the settings page are saved in your Shopify store, as part of the app's checkout rule, not on our server.

Information about your customers

At checkout, the app looks at the first two lines of the shipping address and the name of the chosen shipping option, only to decide whether the address is a PO box the shipping option can't deliver to.

This check runs inside Shopify's checkout, as a Shopify Function. Shopify Functions can't connect to outside servers, so customer addresses are never sent to us. We don't receive, store, log or share any customer information, including names, email addresses, phone numbers, addresses or order details.

How we use information

We use the store information above only to run the app for you. We don't sell or rent it, use it for advertising, or share it with anyone except the service providers below.

Service providers

• Shopify runs the checkout check and keeps your app settings.
• Render (render.com) hosts the app's server in the United States and stores the store information listed above. Render's server logs may briefly record basic request details, such as your store's Shopify address.

Cookies

The app doesn't use cookies for tracking or advertising. Shopify may use its own cookies to sign you in to the app inside Shopify admin.

How long we keep information

When you uninstall the app, we delete your store's access information. When Shopify asks us to erase a store's data, which it does 48 hours after uninstall, we delete anything that remains. Uninstalling also removes the app's checkout rule from your store.

Security

All connections to the app use HTTPS. Access tokens are kept in a private database that only the app's server can reach.

Your rights

Depending on where you live, you may have the right to access, correct or delete your personal information, for example under the GDPR or the CCPA. Merchants can contact us at the email below.

Customers of a store that uses the app should contact that store. Data requests sent through Shopify reach us automatically. Because we don't keep customer information, there is nothing for us to return or delete.

Changes to this policy

If we change how the app handles information, we'll update this page and its effective date.

Contact

David Warwick
david.warwick1969@gmail.com