Request for tax statement for rental verification?

[Billy Bob]

My step daughter wants to rent her first apartment. The Property Management Co. wants a copy of of my property tax statement to verify I own my current home. They also want the Bill of Sale on my  previous home I sold to verify I was the owner. How does this verify HER rental history? I'm not applying for the rental and I'm not co-signing for her. They're not asking for a copy of a Rental Agreement between us. Why would they ask for this info? TIA!