You have the possibility to set up automatic refunds based on the fraud status or fraud score of the charge that has been processed. This allows you to avoid a potential chargeback. 

This article shows how to set that up. 

Setting up the refund rule 

1. Pick the account you want to set up the rule for using the drop-down on the upper right side of the backoffice. 
   
2. Click on the account name again.
3. Click on Account settings.
4. Navigate to the Charges section.
5. Pick what should happen based on the fraud check result. Optionally you can also decide if refunding should cancel the subscription. 
6. Click the Save button.