Should I have replacement cost or actual cash value property insurance?

To avoid under insurance your insurance policy sum insured must reflect the actual value of you property , However the insurance company upon loss has the right to pay you the total amount of sum insured or return your property to it's position where it was immediately before the loss , in other words return you to the financial position where you are immediately before the loss event , according to the principle of indemnity

In case that there is two types of insurance polices of which one covering the replacement cost and the other covering the actual value ,I recommend to choose that covers the actual value of your property. 

Thanking you