28 CFR § 814.12 - Non-waiver of rights by payments.

An employee's involuntary payment, of all or any portion of a debt being collected under 5 U.S.C. 5514 must not be construed as a waiver of any rights which the employee may have under 5 U.S.C. 5514 or any other provision of contract or law, unless there are statutory or contractual provisions to the contrary.