Yes. Generally speaking, a Will can be challenged in two ways.
First, the validity of a Will may be challenged. A Will may be invalid for a number of reasons, such as where the will-maker did not have the required mental capacity to make their Will or where they were unduly influenced or coerced to make their Will in a particular way (more info…).
Secondly, a person who has been left out of a Will or received a small inheritance may, in certain circumstances, contest the terms of a Will by way of a Testator’s Family Maintenance claim (more info…).