Insurance question

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Hello,
I apologize if this has been answered several times already, but I was wondering about insurance on a house - when the investor is doing a "subject to" purchase agreement to buy a house in a pre foreclosure, and does not plan to pay off the underlying financing for a period of time, what is the best way to keep the lender from getting wind of the change in ownership and potentially exercising the due on sale clause? Thandks for your help! Mike Sedwick in Minneapolis