Question

what is format of hindi formal and informal letter

Answer 1

FORMAL LETTER 
SENDER'S ADDRESS 
DATE (IN EXPANDED FORM)
RECEIVERS ADDRESS
SUBJECT
SALUTATIONS
BODY OF LETTER (IN 2 OR 3 PARA)
APKA BHAVADIY/ APKI BHAVADIYAA
POST
NAME.

INFORMAL LETTER I AM NOT SURE ABT IT SO I THINK U SHOULD ASK SOMEONE ELSE

HOPE THIS HELPS :)