Due Diligence is the process in which a Process Server attempts to make Personal Service
. This process mandates that the Process Server first must attempt Personal Service at times and dates that the defendant might reasonably be expected to be at home or at work. For instance, an attempt to serve a person at work should be made during normal business hours, not when the business is closed. Proper "due diligence" at a residence should be made at different times of the day, on different days of the week in case the defendant has an unusual work schedule.