Michigan Compiled Laws, Chapter 700. Estates and Protected Individuals Code § 700.3305

Sec. 3305. If the register is not satisfied that a will is entitled to be probated in informal proceedings because of failure to meet the requirements of section 3303 or 3304  1 or for another reason, the register may deny the application. A register's denial of informal probate is not an adjudication and does not preclude formal probate proceedings. If the application is denied, the register shall clearly state the reason for denial.