Every day, individuals change their wills, trusts, bank accounts, and other estate documents. These changes often impact beneficiaries and others who expect to receive benefits under these documents. When the changes result in an individual receiving fewer assets than before, litigation can arise. Claims of undue influence and mental incompetence are often alleged in an attempt to void the changes. This paper is intended to give an update on the law in Texas that impacts claims of undue influence and mental incompetence.