(3)
If an employee who is involuntarily separated on account of misconduct or who (excluding any employee relieved of liability under paragraph (2) of this subsection) is voluntarily separated before completing the required period of service fails to repay the amount agreed to under paragraph (1)(B) of this subsection, a sum equal to the amount outstanding is recoverable by the Government from the employee (or such employee’s estate, if applicable) by—
(A)
setoff against accrued pay, compensation, amount of retirement credit, or other amount due the employee from the Government; and
(B)
such other method as is provided by law for the recovery of amounts owing to the Government.
The head of the agency concerned may waive, in whole or in part, a right of recovery under this subsection if it is shown that recovery would be against equity and good conscience or against the public interest.