The FSCS said that consumers may be entitled to compensation if they have lost money as a result of dealings with any of the firms. The announcement is particularly targeted at consumers who have lost money due to insurance advice or arranging.
A firm being declared in default means the FSCS is satisfied the firm has insufficient assets and would be unable to pay claims for compensation themselves.
The 14 firms are:
Winsover Howden (Insurance Brokers) Ltd in Spalding, Lincolnshire
Castle Personal Insurance Brokers Ltd in Berkhamstead, Hertfordshire
Global Home Protection Ltd in Bicester, Oxfordshire
Investbuild Ltd in Andover, Hampshire
JSM Bexhill Ltd in Bexhillonsea, East Sussex
Mercantile Financial Consultants Ltd in Wembley, London
Waters Retail Ltd in Leyton, London
Camden Retail Ltd in Northampton, Northamptonshire
Grosvenor Mortgage and Finance in Sutton Coldfield, West Midlands
Sanderson Law and Company (Life and Pensions) Ltd in Thornton-Cleveleys, Lancashire
Your Car Credit Ltd in Preston, Lancashire
Equity Mortgage Finance Ltd in Gillingham, Dorset
C Jones-Evans & Son in Pwlliheli, Gwynedd.
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Mark Oakes, head communications at FSCS, said: "The FSCS is here to help consumers when authorised firms go bust. We have already started paying compensation in respect of these firms. However, anyone else who believes they may be owed money as a result of their dealing with one of these firms should contact out Initial Contact Team if they have not yet applied for compensation."

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