The more time and details are put into a re-agreement, the more fruitful the relationship between the parties will be. Retainer agreements are beneficial for experts by saving them time and work that they would otherwise have to invest in invoicing. Experts also avoid waiting for payment every time some of the work is completed. This example agreement is published in the book MMPI-2 & MMPI-A in Court: A Practical Guide for Expert Witnesses and Attorneys, 2nd edition, by Ken Pope, Jim Butcher and Joyce Seelen, edited by the American Psychological Association. Copyright belongs to the American Psychological Association. This material is presented here for personal and individual use; For other uses of copyright, please contact the Office of Rights and Permissions of the American Psychological Association.