Not simply anyone might challenge the credibility of a Will. Though state laws differ somewhat, all require that you be connected to the Will in some manner. Usually, you need to have the ability to reveal that you would have gotten more from the decedent, if he or she had actually died without a Will; or if she or he wrote an earlier Will that left you more than the present Will.
Question 2: When can I challenge the Will? Question 3: How can I overturn a Will?