Hi all, In 2009 my former employer wrote to me confirming my job title was being renamed from "Software Development Manager" to "Software Engineering Manager". Additionally, the letter said I was eligible for a £500/month "cash allowance". From that point on, I saw "car allowance: £500" on my payslip. I have since changed companies. My old employer has now written to me (12 months after moving) stating that I was never eligible for the allowance - that it was a mistake - and that I HAVE to pay back the sum of £2070. They have written to me twice. Even if this was their mistake, am I legally required to pay back the money? It was a surprise to me that I was eligible for a car allowance (or cash allowance as it said in the letter) but it was never obvious that it was a mistake. I don't mind defending my position in court but I don't want debt collectors knocking on my door looking for money - could this happen? Thanks all. A nervous ex-employee!