Grammar/punctuation question: How do I sign off a formal letter ?

Factual Questions
1

I’m kinda stuck.

Is it :

Sincerely,

John Doe
Designation
Department Name
Company Name

Or is it :

Sincerely,

John Doe
Designation,
Department Name.
Company Name.

Or is it some combination of the above ? I’m confused with whether (or where) to put commas and full-stops in the sign off.

Awaiting your quick responses so that I may hit the Print button.

A search on a large number of sites just returned samples of one line sign offs, so I’m still confused.

As always, thank you.

2

The former. The line breaks are all the punctuation you need.