You can issue a partial refund on any transaction, and the funds will be deducted from your Flipcause account balance to the card you're supported used to make the transaction.
To quickly find the transaction in question, go to Reports, then use the search bar to search by name, email, or ID. Click Details on the desired entry; this will now open a popup with the transaction details.
Next, Click Refund/Cancel > Select desired refund type > Enter refund amount > Click Submit. The funds will now be credited back to your supporter.
Note: If a supporter wants their money back and will no longer be attending your event, you need to do a full refund. To do this, select Full Refund and Cancel.