Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.8715

Sec. 8715. (1) A person to whom a citation is issued under section 8707  1 shall appear by or at the time specified in the citation and, except as otherwise provided by section 8709(5),  2 may respond to the allegations in the citation as provided in this section.

(2) If the defendant wishes to admit responsibility for the municipal civil infraction, the defendant may do so by appearing in person, by representation, or by mail. If appearance is made by representation or mail, the court may accept the admission with the same effect as though the defendant personally appeared in court. Upon acceptance of the admission, the court may order any of the sanctions permitted under section 8727.  3

(3) If the defendant wishes to admit responsibility for the municipal civil infraction “with explanation”, the defendant may do so in either of the following ways:

(4) If a defendant admits responsibility for a municipal civil infraction “with explanation” under subsection (3), the court shall accept the admission as though the defendant has admitted responsibility under subsection (2) and may consider the defendant's explanation by way of mitigating any sanction that the court may order under section 8727. If appearance is made by representation or mail, the court may accept the admission with the same effect as though the defendant personally appeared in court, but the court may require the defendant to provide a further explanation or to appear in court.

(5) If the defendant wishes to deny responsibility for a municipal civil infraction, the defendant shall do so by appearing for an informal or formal hearing. If the hearing date is not specified on the citation, the defendant shall contact the court in person, by representation, by mail, or by telephone, and obtain a scheduled date and time to appear for an informal or formal hearing. If the hearing date is specified on the citation, the defendant shall appear on that date. The hearing shall be an informal hearing, unless a formal hearing is requested by the defendant or the plaintiff as provided by section 8717.  4 If a hearing is scheduled by telephone, the court shall mail the defendant a confirming notice of that hearing by regular mail to the address appearing on the citation or to an address that is furnished by the defendant. An informal hearing shall be conducted pursuant to section 8719,  5 and a formal hearing shall be conducted pursuant to section 8721.  6