Writing a cover letter for a previous employer requires highlighting your existing knowledge, valuable skills, and showcasing how you've grown since leaving. Example: "Hello, I'm a former employer of ABC and I'm very interested in the job of production manager that you have advertised.Don't forget to include a cover letter in the body of the email. • When emailing resume files, name them so the employer can easily identify it as your resume. We'll tell you why you might be asked to reapply for your current job and how you can succeed. Plus we've provided some sample cover letters to use. Not sure how to write a cover letter? Tell the reader who you are and why you are writing the letter. O Introduce yourself. The document is a sample cover letter for returning to a previous employer.