Dear XYZ,
My words really fail to express joy at the news of your selection as (Position Name..) in the (Bank/Institute Name…). Your selection, was however, no surprising because a man of your caliber and superior learning ability was bound to ticket excellently. A (Position Name) post in the (Bank/Institute Name…) is one of the most highly prized posts in our country from the point of view of the wide and quick opportunities for promotion. A boy selected as a (Position name) at a real young age as yours stands chances of reaching the highest post in the officers cadre in the Country. It really is an added pleasure for us all that the place of your posting is just far away of five miles coming from your house and you can always expect you soon after every fortnight.
We all send you our heartiest congratulations and best wishes.
Yours sincerely,
Name….
Address….