Install. Configure.
Validate with confidence.

Warn when an address contains a PO box, including variations such as P.O.B. or Post Office Box.

Check it: Test supported variations when this rule is enabled.

Manual p. 5

Check for private mailbox addresses and warn the customer.

Check it: Use a supported PMB example to check the prompt.

Manual p. 5

Check that address line 1 includes a house number.

Check it: The manual uses Main Street as an example missing a number.

Manual p. 5

Check that address line 1 includes a street name.

Check it: The manual uses 1200A as an example missing a street name.

Manual p. 6

Flag an address where secondary information may be required and prompt the customer to add it.

Check it: Test a supported U.S. address that requires a unit, plus one that does not.

Manual p. 6

Set the minimum number of characters permitted in address line 1.

Check it: Example: 1 A triggers the warning when the minimum is 5.

Manual p. 6

Set the maximum number of characters permitted in address line 1.

Check it: Test a street address that exceeds your chosen limit.

Manual p. 6

Set the maximum number of characters permitted in address line 2.

Check it: Test lengthy delivery instructions against your chosen limit.

Manual p. 6

Choose no character check, Latin-based characters with diacritics, or Latin-based characters without diacritics.

Check it: Check examples with accented and non-Latin characters against your selected policy.

Manual p. 6

Create a list of U.S. states or territories to restrict.

Check it: Review every region you intend to restrict; the manual gives a lower-48 shipping example.

Manual p. 7

This guide covers the Shopify Plus checkout extension. In the Addrexx dashboard, configure the Shopify Extension (Shopify Plus Only) settings described in the manual.

No. Add the Address Validation by Addrexx checkout-ui app block to the relevant checkout, position it, and save. Then configure and save your validation rules.

The manual places checkout-ui below the shipping-address fields: in the Delivery area for one-page checkout and below Shipping address in the Information area for three-step checkout. Use the screenshots in the checkout section to identify the intended placement.

The manual describes independent rule configurations for U.S. and international shipping addresses. Review both sets so the rules match your shipping policies.

No. The manual identifies missing apartment, suite, and unit checks as a U.S.-address feature.

Yes. When the customer accepts a suggested correction, the Shopify shipping address is updated. This is checkout address validation, not address autocomplete.

Check that the country is in the validation-enabled country list, that the associated enable control is on, and that you saved the dashboard. Also check that the checkout app block is present in the checkout you are testing.

No. One list controls where address validation runs; another controls countries to which you want to restrict shipments. Review each list and its enable control separately, then save.

In the checkout editor, select the Addrexx checkout-ui app block, check Include app block in Shop Pay, and save. The manual describes validation of the default address on page load and when the customer selects another saved shipping address.

Confirm that you edited the Shopify Plus extension settings, the correct U.S. or international rules, the country and enable controls, and that both the dashboard and checkout changes were saved. Then repeat the relevant test.

No. Use validation to identify address issues and let customers review corrections. Delivery still depends on the address, carrier, and fulfillment process.

Email support@addrexx.com for technical help. Include your Shopify store URL, the checkout path, the rule involved, and what happened. Do not send passwords, card details, or customer address data. Billing questions go to payments@addrexx.com.