My ThemeForest client wants support on multiple sites

Hello!

My ThemeForest client wants support on multiple sites by purchasing one item. What should I do in this case? Should I provide support only for one site or multiple? There is any support policy for this?

Thanks

They have to purchase individual licenses for each site they plan to use the item on. There is no such thing as a multi-site license.

You will need to support each copy/license they purchase

Thank you.