"Incorrect recording of national insurance contributions is highlighted as another reason behind underpayments, so it is worth making sure that the data held for you is correct.”
A DWP spokesperson said: “Our priority is ensuring pensioners receive the financial support to which they are entitled, and state pension underpayment rates due to official error remain low at 0.5 per cent of expenditure.
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"Where errors do occur, we are committed to fixing them as quickly as possible.”
amy.austin@ft.com
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