Question

Who to write a letter on marklist from principal?

Answer 1

I am surprised you already know so precisely what would be asked in your exam.
Anyway, since this is a formal letter give due stress on the correct format , grammar and be precise and to the point.
Here's an example:

To
The principal, 
Abc school,
X city- pincode.
Y state.

Date: 4/04/2016

Subject : Request for issue of transfer certificate and mark sheet

Sir/Madam, 
I, Abcd , roll no 1, of class IX C , request you to kindly issue me my transfer certificate and mark sheet.
My father has been tranferred to ac city and thus to get admission into another school of repute in ac city, I would need the aforementioned documents.
I would be highly obliged.

Thanking you,

Yours sincerely, 
(Sign)
Name
Roll no
Class
Your school account number.

All the best for your exams.