This person has the number that currently exists.
How can I change the purchase code to prevent someone else from using my template?
It’s your responsibility to keep the purchase code safe. There’s no way to change the code.
Hi @VictorVenegas33, if your purchase code has been compromised it would be best to contact the author of your theme first, as they may be able to lock it to a specific website for you. If all else fails, try contacting Envato Support for further advice.