Is it possible not to name a benificiary in a retirement plan?

Our uncle died but we were informed by the Retirement Plan Administrator that they could not find any benificiary on file? How can we verify this. We have no cop of the plan. Is it possible not to name a benificiary to a retirement plan? Anybody please help.

Depending on the rules for that plan it could be. If there was no named beneficiary the proceeds of that retirement plan would normally become a part of the estate assets. Again the rules (law) for the state in which he passed will determine how that money will be or can be distributed. You would be wise to find someone familiar with this area of the law in your state to assist you. That does not necessarily mean hiring an expensive attorney so do a little research before doing so.