Will obtained by coercion, undue influence, deceit, or fraud

(1) A will obtained by coercion, undue influence or by deceit or fraud, is voidable. (2) The intestate heir forfeits his right to the inheritance when by deceit, fraud, undue influence or coercion he had prevented the estate leaver from making a will and the inheritance shall devolve on the person upon whom it would devolve, had such heir not existed.