36 CFR §1201.35 — Will the collection of a claim by salary offset act as a waiver of my rights to dispute the claimed debt?

No, your involuntary payment of all or any portion of a debt under this subpart will not be construed as a waiver of any rights that you may have under 5 U.S.C. 5514 or other provisions of a law or written contract, unless there are statutory or contractual provisions to the contrary.