A joint will is simply a will that two people make leaving everything to the other. This type of will also includes stipulations on what happens should the other person die. Typically used by a husband and wife, this type of will is designed to prevent the surviving spouse from changing their mind and not doing what the deceased person wanted or have changes in their life that make them want a new will which would go against the deceased wishes. Joint wills are irrevocable unless both parties agree to the revocation - although there are some extreme situations which could possibly have the will revoked it is difficult. Joint wills should be thoroughly discussed with an attorney and alternates discussed before agreeing to one.