22 C.F.R. § 713.3
How do I request nonpublic records or testimony?
To request nonpublic records or the testimony of an DFC employee, you must submit a written request as described in § 713.4 to the Vice-President/General Counsel of DFC. If you serve a subpoena on DFC or an DFC employee before submitting a written request and receiving a final determination, DFC will oppose the subpoena on the grounds that you failed to follow the requirements of this part.