Prevent Disputable Chargebacks

For digital products, imagine you’ve built something then email your customer the finished product. Now, they dispute a chargeback for item not delivered. This happens all the time. A product could be built where you upload your finished digital product, to a service, then the customer downloads after. Before the download, the end user agrees to xyz before downloading. This way you have proof of the download. To add, the download link could be valid for x days before it expires.