On April 8, Ledger SAS must respond to consumer allegations in the United States that it misleadingly promoted the security of its cryptocurrency cryptographic "wallet" devices, a U.S. federal court ruled. U.S. District Court for the Northern District of Illinois Judge LaShonda A. Hunt said that although the sales contracts for Nano S and Nano X hardware equipment mention the application of French law, such references are not exclusive, and consumers 'accusations do not depend on the application or interpretation of the contract, so the contract cannot limit consumers' litigation locations. "SAS" is one of the types of companies commonly used by French companies. This company structure is similar to the "Limited Liability Company"(LLC) in the United States. It provides a flexible management structure and shareholder liability protection and is usually used for small and medium-sized enterprises or startups.