This paper is a primer for physicians and their counsel, outlining ways of avoiding a malpractice suit and what to expect in court. My first county medical society appointment in 1912 was as chairman of the legislative committee, and in the years intervening I have had wide experience advising doctors, helping defense attorneys, appearing in court many times as an expert witness, and as a defendant. So I speak from experience. The suggestions as to technique are, in the main, from the recordsm of three cases (containing photostatic copies of all office and hospital records, pyelograms, detective reports, etc.), loaned by a malpractice insurance company