The brothers are also accused of creating two false-front businesses they used to process charges from the cards.
The search of the home turned up luxury items, including high-end jewelry, accessories, clothing, luggage, appliances and flat-screen televisions.
The brothers are charged with mail fraud and identity theft, but prosecutors say the list of charges is expected to grow.
Information from: The (Wilmington, Del.) News Journal, http://www.delawareonline.com