There are some instances where you should leave some assets and provisions out of your will. Assets such as life insurance policies or retirement funds, or pretty much any assets that already have a named beneficiary should not be included in a will, because the asset will automatically be passed on to the beneficiary. making it unnecessary to include them in your will. Another example of assets that should not be included in a will, is any property that is jointly owned. pretty much the whole point of this kind of property is that it will be automatically transferred to the surviving part, thus, making it unnecessary to include it in a will. The same goes for a property that is already included in a trust. When you put the property in a trust, it becomes part of it and it is subject to the trust rules. so adding this property to a will, could cause inconsistencies and delay both processes. A will and a trust should work complementary and not against each other.