In response to customer complaints, the Financial Ombudsman Service (FOS) has assessed a number of payment protection insurance complaints against TMMP, finding in favour of the complainants.
The FCA said that it is aware that some customers who are trying to resolve complaints have had difficulties in establishing contact with Mortgage Matters.
However, the watchdog said that at this time claimants should not contact the FOS.
It therefore advises former customers to make a complaint or claim via the Financial Services Compensation Scheme (FSCS) claim service, which can be completed online, or to call the FSCS on 0800 678 1100.
The TMMP is a former mortgage and insurance intermediary which is authorised by the FCA but is no longer trading.