I am not sure about MI, but in my state it is signed by the Buyer prior to purchase.
Your Realtor should be able to get all the documents you need.
If you are not being represented by a Buyer's agent ... why not?
It should cost you nothing to have your own representation in the purchase of a home.
Let me know if you have more questions! I'm more than happy to help in any way that I can.
This is a question your Realtor should be taking care of, if you do not have a Realtor, hire one today.
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Financing Kentucky One Home at a Time