Business letters are written on the company's letterhead stationery, which includes the organisation's Full name, Address, Telephone, Fax or Telex numbers, and E-mail address. Below are the parts of a business letter that we need to include while writing the same.

- Date
- Attention Line
- Inside Address
- Subject Line
- Salutation
- Body of the Letter
- Complimentary Closing
- Signature
- Reference Initials
- Enclosure Notation
- Copy Notation

Not all of the above components are always used. Based on the requirement a combination of these can also be used. For example, the "Attention line," "subject line," and "En-closure" notations are used only as they apply to a particular letter.