Informal Letters are letters that are written to friends, family, and relatives.
The purpose of the letter is to communicate personally.
In this type of letter, we use a casual and emotional tone.
For e.g : Letters written to friends, relatives, acquaintances, etc.
Informal letters are letters that are written for business and professional purposes.
We write this type of letter with a specific objective in mind.
It is also known as a business letter.
it is written in a formal language with a specific structure and layout.
For e.g : Letters written to partners, suppliers, customers, clients, etc. , college or institute, employer, professionals, etc