Sales reversals happen as a result of payment processors (for example: a bank) reversing transactions that have previously been cleared. Sales reversals can be for a number of reasons, but at the end of the day they are not created by us. Sales Reversals are initiated by a bank or payment processor (Paypal, Skrill, Mastercard and so on) and we (Envato’s finance team) have to adhere to them.
Honestly, it happens. We know sales reversals are pain for authors. They’re a pain for us too, but they’re a reality of running an online marketplace at scale. We have an amazing team of people here at Envato dedicated to securing our platforms and preventing this kind of activity, but unfortunately there is no way to completely prevent them.