Raphael Geys previously worked for Franceâs second largest bank as the director of European fixed income sales before he was let go in November 2007.
The manager was offered â¬7.9 million as an entitlement after the termination of his contract, a figure which he is now disputing in the High Court.
Lawyers for Mr Geys have claimed that he should receive over â¬11 million, especially as during his three years with the bank the department generated as much as â¬440 million in income.
A document from the bankerâs legal team, quoted by the Financial Times, said: âHe was dismissed for being too successful in that role because the provisions in his contract were considered by the bank to be too generous.â
The lawyers also claimed that Mr Geys was never provided with a reason for his dismissal.
SociÃ©tÃ© GÃ©nÃ©rale is now alleged to have claimed that by launching a law suit against it, the former-employee has forfeited his rights to any severance pay.
The case continues.
By Jim Ottewill