Workers at UK insurance firm Legal & General (L&G) have informed the company about alleged deliberate overcharging by a major supplier.
The details of the allegations, which were made in August last year, could be revealed at the L&G AGM in May.
Workers at L&G originally informed the company's CEO Tim Breedon of the allegations, by letter, in August last year.
The allegations involve claims that some workers at a major outsourced service supplier have been deliberately mischarging L&G for units of work. This is said to include a practice of charging for extra days of work that have not been done.
Workers could reveal the details of the letter, which has details of the alleged overcharging, including names of some people involved.
In an email to a whistleblower, in response to an update request, the L&G Financial Crime and Information Protection department said it was unaware of the letter sent to L&G CEO in August.
L&G declined to comment.
The group of workers say they have contacted the Financial Services Authority and the Serious Fraud Office. Neither organisation would comment.