---
title: "WooCommerce Checkout block postcode validation fixed: 2026-10-09 | Harbyn"
description: "WooCommerce Checkout block postcode validation fixed, announced Oct 9, 2026."
canonical: "https://harbyn.com/changes/woocommerce/2026-10-09-woocommerce-11-2-1-release-notes-2"
last-updated: 2026-10-09
---

# WooCommerce Checkout block postcode validation fixed

Markdown version of <https://harbyn.com/changes/woocommerce/2026-10-09-woocommerce-11-2-1-release-notes-2>.

Behavior change - WooCommerce. low severity. In effect.

WooCommerce 11.2.1 accepts Argentine postcodes without a province letter again, along with postcode formats for El Salvador, Saint Vincent and the Grenadines, and the British Virgin Islands that 11.2.0 rejected.

## Facts

| Fact | Value |
| --- | --- |
| Vendor | [WooCommerce](https://harbyn.com/vendors/woocommerce.md) |
| Kind | Behavior change |
| Severity | low |
| Status | In effect |
| Announced | Oct 9, 2026 |
| Added to Harbyn | Oct 9, 2026 |
| Lead time | No dated deadline |
| Vendor page | <https://developer.woocommerce.com/2026/10/09/woocommerce-11-2-1-release-notes/> |
| Review | Reviewed by a person, extracted by a model |

## Find it in your code

```sh
npx harbyn scan
```

This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses WooCommerce, from its packages and API hosts. Nothing leaves your machine.

## Sources

Where this event comes from: the page we read, when we read it, and the hash of that snapshot.

- <https://developer.woocommerce.com/feed/> (changelog, fetched 2026-10-09 22:43 UTC, sha256 `4d9292c5eeaa1df4602f18ef314d7c19ddfc554c4a925551ed9d7acf69aad9d8`)

## Related changes

### More from WooCommerce

- [Classic checkout address handling restored](https://harbyn.com/changes/woocommerce/2026-10-09-woocommerce-11-2-1-release-notes.md) (Behavior change, announced Oct 9, 2026)
- [WooCommerce 11.6 will require PHP 8.1 or newer](https://harbyn.com/changes/woocommerce/2026-09-29-new-requirement-for-woocommerce-11-6-php-8-1.md) (Breaking change, effective Feb 2027)
- [Experimental Dual API engine removed from WooCommerce core](https://harbyn.com/changes/woocommerce/2026-09-28-the-experimental-woocommerce-dual-api-is-now-a-plugin.md) (Breaking change, effective Oct 7, 2026)
- [Proof-of-concept product and coupon API removed](https://harbyn.com/changes/woocommerce/2026-09-28-the-experimental-woocommerce-dual-api-is-now-a-plugin-2.md) (Breaking change, effective Oct 7, 2026)

### Changes at other vendors

- [Amazon Selling Partner API: ORDER\_CHANGE notifications add PreFulfillmentStatusChange for Amazon Autos](https://harbyn.com/changes/amazon-sp-api/2026-10-14-sp-api-updates-new-listings-items-api-ivp-values-in-eu5-jp-and-ca-stores-oct-3.md) (effective Oct 28, 2026)
- [BigCommerce: 301 redirects will apply only to storefront channels](https://harbyn.com/changes/bigcommerce/2026-10-07-301-redirects-now-apply-to-storefront-channels-only.md) (effective Nov 10, 2026)
- [GitHub: Secret scanning audit log business field changes to enterprise slug](https://harbyn.com/changes/github/2026-10-20-updates-to-github-secret-scanning-7.md) (effective Nov 12, 2026)
- [Jira / Atlassian Cloud: New IP address ranges in use from January 1, 2027](https://harbyn.com/changes/atlassian-jira/2026-10-16-atlassian-cloud-adds-new-ip-address-ranges.md) (effective Jan 1, 2027)

[All upcoming deadlines](https://harbyn.com/deadlines.md)