FP1 - Postcode Shipping Guard

Block checkout for postcode, postal code, or ZIP code areas you cannot serve—without rebuilding your Shopify shipping zones. Add an optional cart warning before checkout.

Best for: Stores that need delivery exclusions inside otherwise allowed shipping zones.

Not for: Blocking entire countries or replacing Shopify shipping zones.

$5.99 USD/monthafter a 14-day free trial • billed by Shopify • cancel anytime

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30-day first-charge guarantee
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Clear setup guide

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No-code rulesAdd exact codes or prefixes

Checkout protectionBlocks restricted destinations

Keep your zonesAdds exceptions inside Shopify

Optional warningSet expectations in cart

How it works

Block specific delivery areas inside your existing shipping zones.

Create exact-code or prefix rules; the app checks the delivery code at checkout.

What it does

Keeps your Shopify shipping zones and adds postcode, postal code, or ZIP code exceptions inside them.
Blocks a single code with an exact rule or a wider area with a prefix rule.
Checks the customer's delivery code at checkout and blocks the order when a rule matches.
Can show an optional warning in the cart before the customer reaches checkout.

How it works

Use Shopify shipping zones to define the countries and regions you serve.
Add the exact codes or prefixes you cannot serve in the app.
At checkout, the app compares the entered delivery code with your enabled rules.
A matching rule prevents checkout until the customer changes the delivery address.

How to write rules

Exact rule: block one full code, such as SW1A 1AA or 94105.
Prefix rule: block every code that starts the same way, such as SW1A*, 941*, or M4B*.
Shorter prefixes cover larger areas, so test broad rules carefully.
Spaces are ignored when codes are compared.

Country filter (optional)

Leave the country filter unset when your store sells in one country.
Use it for multi-country stores when the same code pattern could appear in more than one country.

Key benefits

Block local delivery exceptions without rebuilding your shipping zones.
Prevent orders from areas your team cannot serve.
Reduce avoidable cancellations and support tickets.
Update rules in Shopify Admin without code changes.

Questions before installing

Frequently asked questions

Does this replace Shopify shipping zones?

No. Shopify shipping zones still define the countries and regions you serve. Postcode Shipping Guard adds code-level exceptions inside those allowed zones.

What postcode, postal code, or ZIP code formats are supported?

You can block a full code or use a prefix followed by an asterisk, such as SW1A*, 941*, M4B*, or 2000*. Shorter prefixes block larger areas.

Does checkout blocking require theme changes?

No. Checkout blocking does not require theme edits. The optional cart warning appears only if you add the app section to your cart template.

Do you store customer addresses?

No. The app checks the entered postcode, postal code, or ZIP code against your rules. It stores your shop rules, not customer addresses.

How does billing work?

The app uses Shopify Billing with a 14-day free trial, then costs $5.99 USD per month. Uninstalling or cancelling stops future renewals. The first paid month is covered by a 30-day first-charge guarantee.