Depending on the type of will (e.g. public, private, secret) our Civil Code defines the cases, which result in the invalidity of the will due to non-observance of its legal form. In addition, a will can be challenged due to its content (e.g. opposition to good morals, deception – fraud – threat to the deceased, etc.), due to forgery, due to the incapacity of the testator to draw it up or due to the omission of a legal shareholder.