• Deprecated the Submit onboarding data endpoint.
• Previously, we allowed all merchants to refund an additional €25 on top of the original payment amount. We removed this functionality by default for all merchants as of May 29th, 2023. If you have a good use case for over-refunding, please reach out to Mollie Support so we can work with you on enabling this for your account.

Added the Create client link endpoint.

Added the dagiftcard as gift card issuer.

Added new Manage order lines endpoint.

• Added support for a dedicated cancelUrl in the Payments API and Orders API. The consumer will be sent to this URL if they cancel a payment or order. If the cancelUrl is not provided, the consumer will be sent to the redirectUrlas was already the case.
• Added support for Idempotency-Key headers in the Mollie API, making API requests repeatable and idempotent within a specific timeframe. See API idempotency.