A will or testament is a law document in which people specify and regulate the rights of others over their estate after their death. The length of Wills can vary greatly, depending on the desires of the person making the Will (testator), and the size of his or her estate. The content of a Will is a legal declaration of how property will be distributed following the death of the testator.  There are many requirements for a Will to be valid, including the revocation of all prior Wills, the demonstration of a sound mind, and the presence and signatures of disinterested witnesses. A Will must be signed at its conclusion. Despite their many benefits, most do not have a valid will, which can result in discord and distress for those that survive them.