To write a professional reference letter for a colleague, you should^{1 2}:

1. Review the necessary information.
2. Introduce yourself and explain your professional relationship.
3. Include specific examples of your coworker’s accomplishments.
4. Explain what your coworker will add to the new company or university.
5. Include contact information.
6. Address the recipient.
7. Enlist coworker’s achievements.
8. Include examples of coworker’s accomplishments.
9. Describe how the coworker will be beneficial to the company.
10. Conclude the letter.