Question

what are the best closing sentences for formal letter​

Answer 1

Letter to editor:

I thereby request the concerned officials to kindly do the needful

Letter for request:

I thereby request you to kindly do the needful.

Letter of complaint:

I thereby request you to make changes accordingly.

Letter of invitation:

I would be very honoured if you would enlighten our (event or whatever is the question) by making an appearance

Answer 2

Answer:

The Purpose of the Closing Sentence

The words you use at the end of your communication should confirm a connection and clarify the purpose of your letter.

For some people, the last sentence is used to simply repeat the most important points of the communication.

For others, it is an opportunity to give an instruction or a call to action.

You may want to express thanks or appreciation.

Your ending might be an invitation to continue the relationship in the future, in general or at a specific date and time.

Still others might want to conclude with an expression of feeling.