28 U.S.C. § 1822

Competency of interested persons; share of penalties payable

Any person interested in a share of any fine, penalty or forfeiture incurred under any Act of Congress, may be examined as a witness in any proceeding for the recovery of such fine, penalty or forfeiture by any party thereto. Such examination shall not deprive the witness of his share.

( June 25, 1948, ch. 646 , 62 Stat. 950 .)