comfort letter means: An independent auditor sent a letter to accompany a preliminary prospectus. It stated that although a complete audit was not performed, they have done an adequate’review’ to ensure that the financial statements in the prospectus are correct to their knowledge. In effect, the auditor states that if a complete audit had been performed, the auditor is confident that audited financial statements will not differ from those in the preliminary prospectus. (in Stock Market Dictionary)