On March 1, 2026, the Register modifications on order endpoint will be deprecated. We stopped providing support for this API on December 31, 2025.

The Create order modifications endpoint offers an improved order modification experience, allowing you to preview, retry, and cancel the changes. You can also view change details, summary, full history, and settings.

As a result, the Register modifications on order endpoint will be deactivated on March 1, 2026.

Learn more in the article Adapting your integration for Order modifications.