A more thorough explanation:

Definition: Contra non producta is a Latin term used in Scots law. It means "against things not produced". It is a decree that declares a challenged deed as void in a reduction action.

Example: If someone challenges a will, the court may issue a contra non producta decree if the person who made the will did not produce evidence to prove that they were of sound mind when they made the will.

This means that if the person who made the will cannot provide evidence that they were of sound mind, the will can be declared void by the court.

Another example could be in a property dispute. If someone claims ownership of a property, but cannot produce evidence to prove their ownership, the court may issue a contra non producta decree, which would declare their claim as void.

Overall, contra non producta is a legal term used in Scots law to declare a challenged deed as void if the person who made the deed cannot produce evidence to support their claim.