The Illinois Sheriffs Certificate Of Time Defendant Held In Custody is a form used by the Illinois Sheriffs to document the amount of time a defendant is held in custody. This form is legally required for any defendant who is held in custody in the state of Illinois. The form contains information on the defendant's name, date of birth, arrest date, release date, and time spent in custody. There are two types of Illinois Sheriffs Certificate Of Time Defendant Held In Custody: the basic form and the advanced form. The basic form is used to document the time a defendant is held in custody within the state of Illinois. The advanced form is used to document the time a defendant is held in custody outside the state of Illinois. Both forms are signed by the Illinois Sheriff, or their designee, and serve as proof of the amount of time spent in custody.