---
title: "BigCommerce Duplicate Worldpay Access checkout payments now return duplicate_transaction with HTTP 400: 2026-10-07 | Harbyn"
description: "BigCommerce Duplicate Worldpay Access checkout payments now return duplicate_transaction with HTTP 400, announced Oct 7, 2026."
canonical: "https://harbyn.com/changes/bigcommerce/2026-10-07-clearer-error-for-duplicate-worldpay-access-payments-at-checkout"
last-updated: 2026-10-08
---

# BigCommerce Duplicate Worldpay Access checkout payments now return duplicate\_transaction with HTTP 400

Markdown version of <https://harbyn.com/changes/bigcommerce/2026-10-07-clearer-error-for-duplicate-worldpay-access-payments-at-checkout>.

Behavior change - BigCommerce. low severity. In effect.

When Worldpay Access rejects a checkout payment as already processed, the response now returns duplicate\_transaction instead of server\_error and HTTP 400 Bad Request instead of 500 Internal Server Error.

## Facts

| Fact | Value |
| --- | --- |
| Vendor | [BigCommerce](https://harbyn.com/vendors/bigcommerce.md) |
| Kind | Behavior change |
| Severity | low |
| Status | In effect |
| Announced | Oct 7, 2026 |
| Added to Harbyn | Oct 8, 2026 |
| Lead time | No dated deadline |
| 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 BigCommerce, 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://docs.bigcommerce.com/developer/changelog.md> (changelog, fetched 2026-10-08 17:16 UTC, sha256 `ae3b40fa107f36384eb280a930b724f422b40bbe01df2857699de46f7d5e330e`)

## Related changes

### More from 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) (Behavior change, effective Nov 10, 2026)
- [Japanese prefecture names now use English spelling](https://harbyn.com/changes/bigcommerce/2026-10-07-japanese-prefecture-names-now-use-english-spelling.md) (Breaking change, announced Oct 7, 2026)
- [Storefront GraphQL returns zero, not null, for price list sale and retail prices of 0](https://harbyn.com/changes/bigcommerce/2026-10-06-price-list-sale-and-retail-prices-of-zero-now-return-zero.md) (Behavior change, announced Oct 6, 2026)
- [Authorize.net order description format change](https://harbyn.com/changes/bigcommerce/2026-10-05-authorize-net-order-description-fix.md) (Behavior change, announced Oct 5, 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)
- [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)
- [Let's Encrypt: Default certificate lifetime changes to 64 days](https://harbyn.com/changes/letsencrypt/2026-10-07-64-day-certificate-lifetimes-coming-feb-2027.md) (effective Feb 10, 2027)

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