This particular law has not changed that I am aware of. In MN, you need two witnesses. You do not need to have a notary. Your uncle got this backwards and so the codicil is apparently invalid. This is another example of why it is so vital to have your estate planning documents done through an attorney. This all could have been avoided, if he had not tried to do this on the cheap.
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I agree with Mr. Frederick. In Minnesota a will or codicil must be witnessed by two persons to be valid. As Mr. Frederick points out, this is one of many reasons that it is important to retain an experienced estate planning attorney to assist in the preparation of any estate planning documents.
Mr. Henline is licensed to practice law in the state of Minnesota. He has prcaticed for nearly thirty years and his practice focuses in the areas of trusts, estate planning and probate, real property and small businesses. This does not create an attorney/client relationship. This does not constitue legal advice. The response is intended to provide general legal information. It is limited to facts of the question. You should consult an attorney in the appropriate state involved before making any decisions based on this answer.
You need two witnesses, not a notary. You only need a notary if you wish to make the will "self-proving". In such a case, the witnesses will need to sign additionally in front of the notary. This provides an extra level of insurance in case the witnesses are not available to testify in the event of a will contest.
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