Several years ago, I had an employee call and ask for a beneficiary change form for his life insurance. I sent it out. That was on a Friday.
Over the weekend, that employee was killed in a car accident.
We KNEW that he wanted to change his life insurance beneficiary. We asked his family to look to see if he'd filled out and signed the new form. If they'd found it, we would have honored the change, even though he never turned it in to us. As they couldn't find it, we had to pay out to the original beneficiary.
But yes, if your lawyer is telling you that the form doesn't need to have been turned in to anyone as long as it's dated and signed properly, the lawyer is right.