How to block PO Box shipping and restrict rates by address in Shopify

Updated August 13, 2026 · SMART Shipping Rates (E-TRADE PARTNER)

You can hide Shopify delivery methods when the shipping address looks like a PO Box, Locked Bag, or Private Bag by matching address-line text. SMART Shipping Rates & Rules does this in Delivery customizations with Shipping address line 1 and Shipping address line 2. Matching is case-insensitive text on what the customer typed. It is not a postal-address validation service. These hide rules do not require Carrier Service.

Many parcel carriers will not deliver to a PO Box. Couriers need a street they can reach. If Standard shipping still appears for PO Box 123, the order either fails later or your team pays to redirect it. The checkout should hide methods you cannot fulfill to that address style.

SMART matches the typed address lines. It does not look up whether the address is a real, deliverable street. A customer can still type a street that is not serviceable, or misspell PO Box so the rule misses it. Treat this as checkout control, not address verification.

When merchants restrict shipping by address

• Parcel or freight methods cannot deliver to a PO Box, GPO Box, Locked Bag, or Private Bag.
• Store pickup should remain (or become the only option) when the address is a box number.
• Local van delivery should disappear when address line 1 is a box, not a street.
• A method should only show when the address contains a required site name, such as a named campus or warehouse.

What Shopify can and cannot do natively

Shopify collects address line 1, address line 2, city, and postal code. Native shipping zones use country, region, and sometimes postal codes. They do not hide a method because line 1 contains PO Box. You need a delivery customization that reads the address text.

Which SMART module to use

Shipping rates zones can match country, city, and postal code. They do not match customer street lines. Origin address lines are the warehouse address, not the customer. For PO Box and other street-text rules, use Delivery customizations.

Address operators

Choose the Address & Contact Details condition set when you create the customization. The useful fields are Shipping address line 1 and Shipping address line 2. Matching is case-insensitive.

Setup steps in SMART Shipping Rates & Rules

1. Write down which existing checkout methods cannot go to a box address (for example Standard shipping and Express). Leave pickup visible if that is the fallback.
2. Open Delivery customizations and create a rule.
3. Choose Hide specific delivery method(s) and select those parcel methods. Or hide by delivery type if every shipping-type method should disappear.
4. Choose the Address & Contact Details condition set.
5. Add Shipping address line 1 contains `PO Box` as the first condition group.
6. Add more condition groups (OR) for other spellings: `P.O. Box`, `P.O.Box`, `POBOX`, `Locked Bag`, `Private Bag`, `GPO Box`. Repeat the same groups on Shipping address line 2 if customers put the box number on line 2.
7. Save, then test in real Shopify checkout. Checkout simulator does not apply delivery customizations.
8. Confirm at least one method remains for a PO Box cart (usually pickup), unless you intend to show no methods.

Worked example: hide parcel shipping for PO Box, keep pickup

A Melbourne store offers Standard shipping, Express, and Store pickup. Couriers will not deliver to a PO Box. Pickup should stay.

1. Create a hide rule for Standard shipping and Express.
2. Add condition groups so the rule runs when line 1 or line 2 contains PO Box, P.O. Box, POBOX, Locked Bag, or Private Bag.
3. Leave Store pickup untouched so a PO Box customer still has a method.
4. Optionally rename Store pickup to Store pickup (required for PO Box addresses) with a second customization if you want that wording only for box addresses.
5. Checkout with PO Box 88, Collins Street and confirm parcel methods disappear. Checkout with 88 Collins Street and confirm they return.

Spellings worth covering

Customers do not type one format. Start with the rows below, then add any pattern you see in real orders. Matching is case-insensitive, so `po box` and `PO BOX` are the same test.

Do not use a lone contains `Box` rule. That can hide shipping for streets such as Box Hill Road or Box Street.

Tips before you publish

• Put each spelling in its own condition group so the groups act as OR. One group with every spelling ANDed together will never match.
• Cover line 1 and line 2. Some themes put the box number on line 2.
• Test the hard carts: PO Box only, street plus PO Box on line 2, Locked Bag, and a normal street.
• If you also need metro versus remote prices, that is postal targeting, not address-line matching. See postcode rates, UK Highlands and Islands, Australia remote postcodes, and New Zealand rural delivery.
• For pickup and local delivery visibility more broadly, see hide pickup and local delivery.

What this rule cannot do

It cannot verify a postal box against a carrier or national address file. It cannot geocode a street. It cannot stop a customer from typing a fake street. Calculated Shipping rates still price by zone (country, city, postal code), not by street text. Use hide rules for address-line control, and zones for geography.

Frequently asked questions