There is no central clearinghouse or repository so you must contact the agency holding the funds directly. Few federal agencies post missing owner lists online. In most cases you will have to make a formal search request via phone, e-mail or letter.
Many claims are subject to a statute of limitations, so take prompt action.
Your account or safe deposit box may have been transferred to another bank after a closure, merger or name change. You may be entitled to collect spin-off shares, dividends or distributions after a merger, acquisition or restructuring, even if the company is no longer listed on an exchange. Three million stockholders are eligible. Do not assume benefits are lost simply because a company went out of business or had an underfunded plan. A recent class action lawsuit restores benefits to thousands of workers.