Good self and good office

[dastgir]

Dear Sir,

In india, while writing formal letters , many people use words like " your good self" or like " to your good office".

Is this correct?

I have not seen any such words in any dictionary.

Regards,

Gulam Dastgir

[konungursvia]

It is perfectly correct, in India, but such things have fallen by the wayside elsewhere. We don't use them outside India any more.