by Brian Crow: Unless the power of gifting funds is specifically provided to the attorney-in-fact, generally they cannot add themselves as beneficiary to an account or make any changes to ownership.
If the prinicpal has named the same individual to be a beneficiary and also act as their attorney-in-fact, this is permissable.
by Ken Golliher: Check your state law. I am familiar with the multiple party account statutes in several states and none would prohibit an attorney-in-fact from being a POD beneficiary. However, the issue is whether there is such a prohibition in your state.
If your question were "Can an attorney-in-fact name himself or herself as a POD beneficiary?" my answer would have been a simple "No," with more encouragement to check the law of your state. In one that I know of, it is flatly prohibited unless the POA expressly grants the authority. In any other, I would suggest that an attorney-in-fact is a fiduciary and general fiduciary principles would prevent him from acting in a way to benefit himself.
Although it too is generic, not driven by the law of a particular state, the CFPB publication on Powers of Attorney is very insightful.