Informal letters are written to the people who are close to us. They include parents, siblings, friends, neighbours, relatives, etc.
FORMAT
X.Y.Z,
Address line 1,
AdAddress line 2,
Pin code.
Date
Dear ------,
First paragraph-introduction
(Greetings, salutations, health enquiry, etc)
Second paragraph- main body
(Matter)
Third paragraph- conclusion (Ending thematter, hoping for positive reply)
Yours loingly,
X.Y.Z