31 C.F.R. § 315.83
(b) Partnerships. A bond registered in the name of a partnership which has been dissolved by death or withdrawal of a partner, or in any other manner—
(2) Will be paid to or reissued in the names of the persons entitled as the result of such dissolution to the extent of their respective interests, except that reissue will not be made in the names of creditors.
The request must be supported by satisfactory evidence of entitlement, including proof that the debts of the partnership have been paid or properly provided for. The appropriate form should be used.