Delaware Code
Subchapter VII. Liability of Trustees and Rights of Persons Dealing With Trustee
§ 3590. Protection of person dealing with trustee.

(a) A person other than a beneficiary who in good faith assists a trustee or who in good faith and for value deals with a trustee without knowledge that the trustee is exceeding or improperly exercising the trustee's powers is protected from liability as if the trustee properly exercised the power.
(b) A person other than a beneficiary who in good faith deals with another person knowing that the other person is a trustee is not required to inquire into the extent of the trustee's powers or the propriety of their exercise.
(c) A person who in good faith delivers assets to a trustee need not ensure their proper application.
(d) A person other than a beneficiary who in good faith assists a former trustee or who for value and in good faith deals with a former trustee without knowledge that the trusteeship has terminated is protected from liability as if the former trustee were still a trustee.
(e) The protection provided by this section to persons assisting or dealing with a trustee is superseded by comparable protective provisions of other laws relating to commercial transactions or to the transfer of securities by fiduciaries.