An informal letter is which we write to our friends and relatives.
 A formal letter is which we write to someone formal. That is to the principal of your school, your class teacher etc.
1 5 1
A FORMAL LETTER is that which we write to the principal , for office work , etc
  • Brainly User
Informal letter means any letter we write to our friend, mother , brother , sister , father or any relatives
and formal letter means letters like applications which you send to your class teacher of your class, or principal of your school.formal letter means : letter of communication to your superior officer, education minister, appointment order, admission letter etc
1 5 1
why sorry?
for reporting ur answerrrr
do I have the option to withdraw it
ok forget this