K.S.A. 60-452: Offer to compromise and the like, not evidence of liability.

Evidence that a person has, in compromise or from humanitarian motives furnished or offered or promised to furnish money, or any other thing, act or service to another who has sustained or claims to have sustained loss or damage, is inadmissible to prove his or her liability for the loss or damage of any part of it. This section shall not affect the admissibility of evidence (a) of partial satisfaction of an asserted claim on demand without questioning its validity, as tending to prove the validity of the claim, or (b) of a debtor's payment or promise to pay all or a part of his or her pre-existing debt as tending to prove the creation of a new duty on his or her part, or a revival of his or her pre-existing duty.