Here’s a tip from one of my favorite blogs and authors, Jonathan Clements from Humble Dollar:
CHECK YOUR BENEFICIARY DESIGNATIONS. Your retirement accounts and life insurance will typically pass to the beneficiaries specified on those accounts, not the people named in your will. If your family situation has changed, or you simply don’t remember who you listed, take a moment to review your beneficiary designations.
Don’t let the ex-spouse get your money when you die! Update your beneficiaries.
How to See Your Beneficiaries for the Thrift Savings Plan (TSP)
If you log on to the TSP page, you need to click on the link along the lower left, marked by the large red arrow:
Then you’ll see this, and you can change them at the bottom: