2310.4 (D) (2) Signature Requirements
This Section discusses the signature requirements for terminating a grant under Section 304 (C). The same requirements also apply to a notice of termination issued under Section 304 (D).
If the grant was executed by one or more of the authors of the work, the notice of termination for any one author’s share must be signed by that author or by his or her duly authorized agent.
If the author is deceased the notice must be signed by the required number and proportion of the heirs who own that author’s termination interest or by their duly authorized agents. In addition, the notice shall contain a brief statement specifying each person’s relationship to the deceased author, such as “widow,” “widower,” “child,” or “grandchild.” See Termination of Transfers and Licenses Covering Extended Renewal Term, 42 Fed. Reg. 45,916, 45,919 (Sept. 13, 1977).
If the grant was executed by the author’s widow, widower, children, executors, or next of kin, the notice must be signed by all of the surviving person or persons who executed the grant or by their duly authorized agents.
If the notice is signed by a duly authorized agent, the notice shall clearly identify the person or persons whom the agent represents.
In all cases, the notice should contain a handwritten signature and a typewritten or legibly hand printed statement containing the full name and address of each party or agent who signed the notice.
37 C.F.R. § 201.10 (C) (1)- (2), (4)- (5).