Recovery of penalty: direct claims on third parties and institutions enforce payment, with limited sworn objections permitted. The recovery officer may require payment of a penalty from the enterprise in default or any third party holding money for it; recovery certificates bind joint holders (presumed equal) and institutions to pay without documentary formalities; post demand claims are void; sworn objections may be made to the Commission; court assistance may be sought for funds in custody; foreign recovery may proceed under reciprocal agreements; transfers made during proceedings are void against penalty claims unless for adequate consideration without notice or with prior Commission permission.