My previous employer whom I left nearly 3 years ago has been in touch and it looks like they made a mistake on my pay (via PAYE) and want me to repay them £171. I apparently paid too little NI contributions over 4 financial years, but the NI office have me down as having paid all I need to ( A class ).
In summary my old employer paid my correct NI contributions to NI Office, but didn't take enough from me. They didn't notice a problem at the time and neither did I, they now after 6 years since starting working for them and 3 since finishing working for them they want me to repay the difference. Can they do this if the mistake is theirs? I don't exactly have a spare £171!!!
any advice is greatly welcome.