One will covering both husband and wife.
a single document signed by both husband and wife, making a single disposition of their property on the death of either of them, or both of them
a single document signed by both the husband and the wife
a single document stating the wishes of two people
a single instrument executed by two or more persons that provides for testamentary disposition of property of each of them
a single will document that is legally sufficient to dispose of the property of each person at his or her death
a single will that covers the estate of each spouse, even if they die at different times
One document for two people (often husband and wife). Problems can arise with this arrangement because the will may be introduced as evidence of a contract to agree, thereby hampering any efforts of one spouse to revoke the joint will to have a separate will written.
One legal document leaving everything to each other or to specified, agreed upon, beneficiaries. p 118, 123