New Jersey Statutes Title 2B. Court Organization and Civil Code 2B § 20-15

a. The Assignment Judge may direct the sheriff to send written notice to a person who has failed to respond to a questionnaire concerning jury service, or who has failed to appear for jury service or has refused to serve, that a fine has been imposed. The notice shall state the amount of the fine, the manner of payment to be made to the sheriff, and the consequences of failure to pay the fine within 30 days of the date specified in the notice. The notice shall be served in the same manner as a summons.

b. If a defaulting juror fails to pay the fine in response to the notice, the Assignment Judge may issue process directing the sheriff to recover the fine and costs by levy on the defaulting juror's personal property.