Which organization would you contact for issues relating to unauthorized financial firms?

The Financial Conduct Authority (FCA) is the correct choice for addressing issues relating to unauthorized financial firms. This organization is responsible for regulating the financial services industry in the UK, ensuring that firms operate within the law and maintaining the integrity of the financial market. The FCA has the authority to take action against firms that are operating without proper authorization or are engaged in fraudulent activities. They provide consumers with a way to report concerns about potentially illegal or harmful financial practices, and they also maintain a register of authorized firms, which can help individuals verify the legitimacy of a financial company.

In contrast, Her Majesty's Revenue and Customs (HMRC) primarily deals with tax collection and related issues and does not focus on financial regulation. The Financial Services Compensation Scheme (FSCS) offers compensation to consumers if an authorized firm fails, but it does not handle issues related to unauthorized firms. The Office of Fair Trading (OFT) was dissolved in 2014, and its functions were transferred to other organizations, including the FCA, meaning it cannot be consulted for current issues related to financial firms.