Your father should consult with an estate planning attorney and also consider a post nuptial agreement with his new wife.
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I agree that your father should see an estate planning attorney. There are many possible options. If he is not married, then he should consider a pre-nuptial agreement when he gets married. If he is married, then a post-nuptial agreement and a trust might be a good idea. Obviously, it is up to your father what he wants to do with his assets.
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This question is not as simple as it seems. Your dad really needs to see an estate planning attorney who's firm also handles family law. The only real way to avoid an elective share issue is by having a spouse sign a pre or post marriage agreement.
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