My client's father had an irrecocable trust for him that converted to a revocale trust at death. The trust was not notorized.

This is highly unusual.  Typically a revocable trust will become irrevocable upon the death of the person making the trust (the "settlor" or "grantor" or "trustor").  Whatever sort of trust it is, the trust will have a trustee.  (If there is no successor trustee named in the trust, you can go to court to have one named.)  The trustee has the power and the duty to distribute the trust assets in accordance with the terms of the trust.  If the trustee is refusing to do this, you can go to court to force him (or her) to do so.  Likewise, if a bank (or other institution or individual holding trust assets) refuses to do what the trustee demands, the trustee can go to court to force the bank to do so.  If, on the other hand, the assets are not in the trust, you may be forced into probate administration (another court procedure).