When I was at the doc's office with my wife, we were issued a copy of a letter from the Michigan DOCH which contained this paragraph that should answer your question:ok is it 21 days from when you get te verification of the priority mail green slip thing that michign makes you send with your papers to the state or is it 21 days after you have like the stub that you sentthe money order with. that would be 21 days from the date of the money order. right? or how does it go