With Evalato you receive the money from every sale directly into your merchant account with the payment processor that processed the transaction. Refunding an amount is done from that same merchant account. After you refund a payment, you should remove the refunded payment in Evalato as well, to make sure the data you have in the system is correct.
Here are a few payment processor help articles about refunding payments:
Removing the refunded payment from Evalato is done by going to Registrations, opening the order that was fully or partially refunded, and making the necessary corrections from Actions > Payments.