Open annotation vs Closed annotation for business writing

Question

For business writing (mail and letters) which one is more preferred annotation?

Open annotation:- Hi James ...... Thanks Vikas

Closed annotation:- Hi James, ...... Thanks, Vikas

Answer 1

There isn't necessarily a "preferred" style. It's a matter of choice and which style guide you follow.

For instance, the Purdue Online Writing Lab suggests using a colon rather than a comma:

Dear James:
. . .

Or, if you put a comma after hello:

Hello, James:
. . .

On the other hand, an editing mentor of mine used a comma when addressing me:

Hello, Jason,
 . . .

My own style has historically been to use just a name and a comma:

James,
 . . .

But, from my personal experience, whether you use a comma or a colon (and whether you put a comma after hello or not, or you use more than just a name), the use of either a comma or a colon is much more common than not using anything at all.