Parole and probation are the two most common forms of supervised release in the American criminal justice system but they work differently and carry different rules and consequences. Parole is granted to someone who has served part of a prison sentence. Probation is typically imposed instead of or alongside a prison sentence. Both involve supervision by an officer, compliance with conditions, and the risk of revocation if those conditions are violated. This section covers the difference between parole and probation, how parole hearings work and what makes a strong case, what supervision conditions typically look like, what happens when a violation is alleged, how to transfer supervision to another state through the Interstate Compact; and what successful completion of supervision looks like. The guidance here is practical and written for people who want to understand the rules clearly enough to follow them without surprises. See also our sections on Release Questions, Halfway House, and Re-entry and Rehabilitation.