Estate Law Questions? Ask an Estate Lawyer.
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To make such changes you would need to prepare an amendment called a "codicil".
The codicil would list the changes and would be witnessed and signed in the same manner as the will. You would then attach the executed codicil to all the original wills floating around, wherever they may be.
Since the execution process is basically the same, many people just prepare a new will and revoke the prior, but a codicil is fine too.
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