Is it mandatory to refund the product instantly? Can we start the refund when the order is back in our warehouse?
You must issue the refund within 14 days of confirming the withdrawal, but you are allowed to withhold the refund until you have received the goods back, or until the customer provides proof of return (e.g. a tracking receipt). You do not need to refund instantly – you can wait for the goods, as long as it falls within the 14-day window from confirming the withdrawal.