A cover letter is drafted for multiple purposes like; job acceptance, salary negotiation, drafting resignation, thanking the employer, or for writing a reference letter for suggestion and many more. (bestcoverletters.com)
It is not really necessary to follow a set format when writing a reference letter for an employee. (coverlettersandresume.com)
It is important to provide designation and contact information of the person writing the reference letter so that contact can be made easy. (coverlettersandresume.com)