Whoever, by reason of the nondisclosure or misrepresentation by that person or by another of a material fact (irrespective of whether such nondisclosure or misrepresentation was known or fraudulent), has received any sum as benefits under this chapter while any conditions for the receipt of benefits imposed by this chapter were not fulfilled in that person's case or while that person was disqualified from receiving benefits shall, in the discretion of the Department, either be liable to have such sum deducted from any future benefits payable to that person under this chapter or shall be liable to repay to the Department for the Unemployment Compensation Fund a sum equal to the amount so received by that person, and such sum shall be collectible in the manner provided in § 3358 of this title for the collection of past-due assessments, or shall be liable to have such sum collected by the Department as provided in § 545 of Title 30, § 6402 of the Federal Internal Revenue Code (26 U.S.C. § 6402), and § 303(m) of the Social Security Act (42 U.S.C. § 503(m)).