Generally it would be the county recorder of deeds. However, if you are not familiar with the process, you would be better off hiring a real estate attorney.
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If you have never run a chain of title before, it is not something you want to try on your own without someone training you. The consequences of a failure could be very high and your "savings" an illusion. Title insurance (which includes running title) is very inexpensive. I would not recommend that you try this on your own based on information you get off the internet.
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