To give a refund, follow these steps:
Log in to Lightspeed eCom.
Go to Orders, find the order, and open it by selecting the order number.
In the Payment panel, select Add a credit invoice and issue the credit.
In the Payment panel, select Mark as not paid. This automatically triggers a refund by Mollie.
If you're switching to Mollie for Lightspeed eCom from Lightspeed Payments by Mollie, keep in mind that you need to be able to process refunds on previous orders.
To ensure that previous orders are accessible, turn off all payment methods in Lightspeed Payments by Mollie, but keep the app itself enabled.