Hundreds of pensioners have been paid the wrong pension for years after calculation errors by Aviva.
The Daily Telegraph reports around 700 workers have been affected who worked for the RAC between 1990 and 1993.
The newspaper puts the total number of Aviva customers to have recently affected by pension errors at 82,000.
One reader who retired two years ago received a third of the pension income she was supposed to be paid.
The issue was detected as part of a routine spot check.
Aviva is writing to all affected customers and is issuing compensation for lost income.
A spokesman says: “As part of our ongoing reviews on behalf of the Trustee Board, we identified an error made by the previous administrators of a specific pension scheme, which meant that some people have not been receiving as much pension as they should have in retirement benefits from this scheme.
“We have been working with the Trustee Board to resolve the matter for those members affected. We are sorry for any inconvenience this has caused and are resolving this matter as a priority.”
Last year Aviva set aside £323m to deal with underpayments on pensions, insurance and savings products affecting more than four million people.