Current tenants didn't pay security deposit

[Kristen Grippe]

Hello, I am about to purchase my first 2-unit investment property. It was owned by a woman who rented the units to family members and never collected a security deposit, so there is technically not a deposit that will be transferred to me as the new owner. What are some ideas for collecting those security deposits to protect myself, since I am not comfortable with not having that in place in case the tenants suddenly cause damage? No sales contract has officially been signed yet, we are still agreeing to the terms. I will be financing the property with a mortgage. Thanks in advance!