The Chief Ombusman is fighting with a financial dispute resolution service about whether the company can use the name "ombudsman".
The use of the term is restricted and businesses or services wanting to use it must get the okay from the Chief Ombudsman.
Despite Judge Peter Boshier taking the position over from Dame Beverley Wakem last year, she is still named in legal action before the High Court.
Financial Services Complaints, a company that provides dispute resolution for providers and their customers, sought approval to use the term 'ombudsman' last May.
FSC wanted to change its name when a competitor proposed to call itself the "Insurance and Financial Services Ombudsman Scheme".