①節(jié)省給付的交換,降低交易成本;②確保債權(quán)的效力.
當(dāng)事人主張抵銷的,應(yīng)當(dāng)通知對(duì)方.通知自到達(dá)對(duì)方時(shí)生效.抵銷不得附條件或者附期限.