Question

a letter to my uncle overseas tellin him to pay my school fees

Answer 1

yea

Answer 2

tell me

Answer 3

We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.

First of all, you don't "tell" him. You need to ASK him. Indicate how other sources are unavailable to you.