The CS01 confirmation statement is a crucial filing for UK companies. It ensures that the information registered with Companies House, such as the company’s directors, shareholders, and office address, remains accurate. This document must be submitted at least once a year, confirming that the company's details have been reviewed and updated if necessary. Failing to file a CS01 confirmation statement on time can result in penalties or even the company being struck off the register. Staying on top of this requirement helps ensure compliance and maintain the company's good standing.