How to test about user refund in sandbox?

My server is able to receive notifications for successful purchases. However, we are experiencing an issue where we do not receive any server notifications when a consumable product is refunded.

Could you please help us verify if this behavior is expected? Also, is there a way to trigger a test refund notification for consumable products in the sandbox environment, so we can ensure our server is correctly set up to handle it?

How to test about user refund in sandbox?
 
 
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