Conditions of supervised probation can also change throughout the duration of the sentence. If the offender fails to meet the requirements stated by their probation officer, they can receive a warning, increased community service, penalties, or revocation of their probation. If an offender only violates one term or condition, they will likely receive a warning or minor penalties, however, if they continually violate conditions, a probation officer can advise that their probation be revoked and the offender be sent back to jail. Probation officers can also choose to shorten sentences for community service or stop making counseling mandatory if the offender shows advancement toward rehabilitation. Probation is the most commonly imposed criminal sentence in the United States, with nearly four million adults currently serving a probation sentence. Probation is the preferred sentence for non-violent crimes, and because most of the committed crimes are non-violent, it is the most common sentence. Probation provides many advantages for offenders as well as