This question just came to my mind. It is not from a book or question bank. Therefore, i do not know the right answer - 

Suppose i am a project manager and i work in US. I am managing a virtual team. My team members are located in India. One of the team member asked me if i can send him the project charter.

I scan the project charter and send it to the team member in India as an email attachment. 

What type of  communication  i just used ?

1) Is it Formal Written as the email has Project Charter in it ?