How to write a letter.Format

Here is a format which is followed now worldwide.

Start everything from LEFT SIDE, NO SPACE in the first line of new para as used to be written earlier.

1. write DATE, TO and FROM address on left.
2. Subject.
3. Body of the letter. Give 2 line space before starting a new paragraph.
4. Regards (thanking you)
5. Your name (Institution, company etc) and signature.