If you want to update a beneficiary on a bank or investment account, insurance policy, or pension, speak to your insurance provider or financial institution directly. If you try to change the beneficiary of a financial product simply by noting it in your will, the original beneficiary could contest the change.
If you want to change a beneficiary in your will, you can use something called a codicil, which is used to make a small change to an existing will. If you want to make major changes to your beneficiaries, it’s usually advisable to rewrite your will entirely.