One of the biggest mistakes with wills is not keeping them up to date. Life events such as marriage, divorce, births, deaths, or acquiring new assets can all affect how your estate should be distributed. If your will is outdated, it might not reflect your current wishes, which can cause confusion or disputes among beneficiaries. Another common error is improper signing or witnessing of the will, which can make it invalid. Failing to clearly name executors or leaving vague instructions can also cause delays during probate. Regularly reviewing and updating your will ensures it stays legally valid and accurately represents your intentions.