How to pass purchase order to another user

Hello I bought a template for developing a client site, but then I discovered that it already had an account in Themeforest. How do I transfer the purchase or license?

You can’t - you can give them the purchase code to allow them to have proof of purchase when using the item but things like future updates and downloads will be restricted to your account

I think there should be a way of doing this, because of your Envato tool kit which request for authentication

You can transfer the license to use the item https://themeforest.net/licenses/faq#license-transferable-a

What you cannot do is transfer access to downloads and updates etc.