What does the cashier's action of "negated" imply?

When a cashier's action is described as "negated," it implies that a certain transaction or action has been voided or canceled. In this context, "negated" communicates that an effect has been reversed, making it as if the original action did not occur at all. This is aligned with the meaning of "nullified," which conveys the idea of rendering something void or ineffective. Thus, the correct understanding of the term reflects the notion that what was once valid or recognized is now dismissed or eliminated from consideration.