I am concerned that if anything happens to me, my ex wife will try to enforce the will as it was written in 2005. What can I do to protect my present wife from this happening?
One option is to execute a new will with updated/clarifying information.
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First, I moved your question to Estate Planning, since it has nothing to do with International Law.
The solution is simple: In your new Will -- and a new Will is plainly called for to avoid ambiguity -- identify you wife by more than her name, such as including her date of birth, the date of the marriage, her social security number, or "as the lady I married second after the other one." Okay, the last choice was for laughs, but it would work just fine.
Do not assume you can continue to use the old Will because of the name similarity. In some states, that will void the bequest, since the law presumes your intent changed after the divorce. In other states, your expressed intention will be enforced as written, and your first wife will inherit. Either way, most of the money will go the the lawyers for resolving the dispute.
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