Is it necessary to use name after writing expressions like Best Wishes and Kind Regards and is it necessary to capitalize initial letter of every word? Let me rephrase my question in another way. Which of the following expressions do you think is more correct?

1: Best Wishes, 2: Best wishes,

John John

3: Best Wishes 4: Best wishes
2: Best wishes,

#2 is correct.

You Can use small letter initially, but in profession it is considered as unprofessionally written.

So if you are writing to casual, you can use small letter, but if you writing to company, please make sure to have capitalized first letter.

Best Wishes