- Writing a cover letter/application letter
- Replying to a job applicant
- Writing customer relation letter, such as letter about change in company address, product promotion, and product recall
- Writing employee relation letter, such as letter of reference, employee announcement, and letter of introduction
- Writing personal business letter, such as letter expressing thanks, letter expressing congratulations, and letter expressing condolences
- Requesting a service
- Confirming a service
- Writing claim/complaint letter
- Writing adjustment letter
- Requesting information
- Providing information
- Ordering supplies
- Confirming an order
- Memo
- Writing reminder/collection letter
- Replying to reminder/collection letter
