Property rights

[mgscoder]

@BlueTechnologyLLC

Those who buy it can only use it once

Yes, you can do it by purchase code verification systems using envato api: https://build.envato.com

you can check this thread for getting help about purchase verification:

How to verify a purchase code using the Envato API

This is a community guide for authors who want to implement purchase code verification on their items, websites, and applications. If you have any questions or feedback then please feel free to respond directly to this topic.  This topic is a wiki. All active members of the forums can edit it. Don’t hesitate to make corrections or add in any new information. All contributions are welcome! Just want some working code to paste into your item? There are some funct…