The person at the bank said that, since the trust was in both of our names, only accounts with both of our names on it could have the trust as a beneficiary. Interestingly, Robert had no problem adding his Fidelity 401K accounts to the trust. His credit union sent him a form and, under the beneficiary designation, it offers "Totten Trust" and "Pay on Death", but there is also a blank space which, I imagine, the fully specified living trust could be added.