Contract of inheritance
Sometimes, domestic unmarried partners may want to make mutual dispositions in their wills. Since they cannot, however, draw up a joint will, they can make a contract of inheritance instead. Contracts of inheritance are also used to impose certain obligations on heirs (e.g. to take care of the testator in old age in exchange for an inheritance). Caution should be exercised when drafting a contract of inheritance, though. Unless you reserve the right to rescind a contract of inheritance, you may no longer be able to unilaterally withdraw from the contract while the other party is still alive.
As you can see, inheritance law offers many options, but it also harbours numerous risks for the uninitiated. Your notary can advise you on any type of testamentary disposition.