How To Write A Letter To An Acting Agent . Here’s how that breaks down… Never, ever open your cover letter to an agent with “ dear *agency name* ” or “ to whom it may concern “. Cover Letter Examples by Real People Acting cover letter sample from www.kickresume.com Once you have a relationship, ask to be represented. The format of writing an authorization letter follows the same format as to a formal. You can include your name and the purpose of your email, like, misha delotto—singer representation. 5.