How's the service charge get refunded

Assume we have custom service charge which applied to each item in order. Will Square refund the service charge partially for each item refund? Or it’s been refunded only when the order has been fully refunded. I couldn’t find the document about this part.

How is the refund being initiated? If its with our API its currently only an amount that’s refunded. Itemized refunds are at this time only available with the 1st party products. :slightly_smiling_face: