There is always a possibility someone will challenge your Will after you pass away. Whether or not that challenge is successful is a different question. Some of the most common reasons Wills are challenged include:

• That the testator was under undue influence or lacked the capacity to make a Will
• That the Will is a fraud/forged
• That the Will lacks the formalities required to be valid, such as being signed and correctly witnessed

Having a lawyer help with the process of creating your Will can help prevent successful challenges.