If your relative is selling a fractional interest in a piece of real estate, ask yourself: “How did my relative obtain partial ownership in this property?”
The usual answer is that there was some type of inheritance. While it is possible there are other reasons, in the majority of cases fractional ownership results from an inheritance.
Property tax records and land records may help you determine who the previous owner was. They may also help you determine who the other fractional owners of the property are besides your ancestor.