If you drive with a drivers license from out of state--ie non-resident (or you have friends visiting you with an out of state license) there is a little known law that requires the Michigan police officer, upon stopping you for a civil infraction (i.e. speeding) to TAKE YOUR LICENSE, or TAKE YOUR $100, or TAKE YOUR GUARANTEED APPEARANCE CERTIFICATE.
Because I don't even know what constitutes a guaranteed appearance certificate, I'm sure most of you don't know either, and probably don't have one in your car.
The Bottom Line is this: If a non-resident is stopped, the police will take their license unless they post a $100 "bond" to ensure that the driver will show up in court in Michigan.
For those who follow the law, you can find it at MCL 257.749