A mum was wrongly slapped with a £5,000 debt letter from the Department of Work and Pensions ( DWP ) due to a shocking case of mistaken identity. Sarah McKenzie, from Belle Vale, has been receiving letters from the DWP's debt division demanding £5,444.19 for five years. Despite previously contacting the DWP and being assured that she does not owe the money, Sarah continued to receive the debt letters. She claims they are now impacting her mental health . Sarah, who cares for her 23 year old