28. Such relief, restraining back recovery of excess payment, is granted by courts not because of any right in the employees, but in equity, in exercise of judicial discretion to relieve the employees from the hardship that will be caused if recovery is implemented. A government servant, particularly one in the lower rungs of service would spend whatever emoluments he receives for the upkeep of his family. If he receives an excess payment for a long period, he would spend it, genuinely believing that he is entitled to it. As any subsequent action to recover the excess payment will cause undue hardship to him, relief is granted in that behalf. But where the employee had knowledge that the payment received was in excess of what was due or wrongly paid, or where the error is detected or corrected within a short time of wrong payment, courts will not grant relief against recovery. The matter being in the realm of judicial discretion, courts may on the facts and circumstances of any particular case refuse to grant such relief against recovery. 29. On the same principle, pensioners can also seek a direction that wrong payments should not be recovered, as pensioners are in a more disadvantageous position when compared to in-service employees. Any attempt to recover excess wrong payment would cause undue hardship to them. The petitioners are not guilty of any misrepresentation or fraud in regard to the excess payment. NPA was added to minimum pay, for purposes of stepping