Duress
Will contests based on duress are relatively uncommon, both because the level of conduct that supports a duress claim is unusual and because it can be very difficult to establish that a testator acted under duress once he or she is deceased. Although there are exceptions, duress is most likely to occur when the testator is isolated with and dependent on a relative or other caregiver.
Some examples of duress include threats of physical harm if the testator does not execute the will and withholding of care, food, medicine and other necessities.