問 我是(shi)一名會計師，現在正(zheng)在濟南一家(jia)服(fu)裝(zhuang)超市工作，想了解(jie)一下什么(me)樣的合同是(shi)無效的？

答 　根據(ju)《勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)法(fa)(fa)(fa)》第18條的(de)(de)(de)(de)規定(ding)，違(wei)反法(fa)(fa)(fa)律、行政法(fa)(fa)(fa)規的(de)(de)(de)(de)勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)和采取(qu)(qu)欺(qi)詐、威脅等(deng)(deng)手段(duan)訂(ding)立的(de)(de)(de)(de)勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)都是無(wu)(wu)效(xiao)(xiao)(xiao)勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)。勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)的(de)(de)(de)(de)無(wu)(wu)效(xiao)(xiao)(xiao)，由(you)勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)爭(zheng)議仲裁委員(yuan)會(hui)(hui)或者人(ren)(ren)民法(fa)(fa)(fa)院確認，引起(qi)無(wu)(wu)效(xiao)(xiao)(xiao)的(de)(de)(de)(de)原(yuan)因大(da)體(ti)有(you)(you)以(yi)下(xia)幾種(zhong)： 　　 1．合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)主體(ti)不合(he)(he)(he)(he)(he)格(ge)。如(ru)受(shou)雇(gu)一方(fang)提供了假的(de)(de)(de)(de)學歷(li)、學位、專業技(ji)術(shu)資格(ge)證書(shu)，聘(pin)(pin)用單位不具備招(zhao)聘(pin)(pin)資格(ge)等(deng)(deng)。 　　 2．合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)內容不合(he)(he)(he)(he)(he)法(fa)(fa)(fa)，即勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)有(you)(you)悖(bei)法(fa)(fa)(fa)律、法(fa)(fa)(fa)規及善(shan)良風俗(su)，或是損害了國家及社會(hui)(hui)的(de)(de)(de)(de)公共利益。如(ru)約定(ding)制造冰(bing)毒、假鈔等(deng)(deng)。內容不合(he)(he)(he)(he)(he)法(fa)(fa)(fa)的(de)(de)(de)(de)勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)不受(shou)法(fa)(fa)(fa)律保護。 　　3．意思(si)表示(shi)不真(zhen)實(shi)(shi)。勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)是雙方(fang)合(he)(he)(he)(he)(he)意的(de)(de)(de)(de)產物，應該是當(dang)事人(ren)(ren)真(zhen)實(shi)(shi)的(de)(de)(de)(de)意思(si)表示(shi)。采取(qu)(qu)欺(qi)詐、威脅等(deng)(deng)手段(duan)訂(ding)立的(de)(de)(de)(de)勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)，違(wei)背一方(fang)的(de)(de)(de)(de)真(zhen)實(shi)(shi)意愿(yuan)，因而是無(wu)(wu)效(xiao)(xiao)(xiao)的(de)(de)(de)(de)。 　　4．合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)形式不合(he)(he)(he)(he)(he)法(fa)(fa)(fa)。這是指(zhi)勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)沒(mei)有(you)(you)采取(qu)(qu)書(shu)面形式、當(dang)事人(ren)(ren)也未實(shi)(shi)際履行主要(yao)義務，或者依法(fa)(fa)(fa)或應當(dang)事人(ren)(ren)要(yao)求應當(dang)鑒證的(de)(de)(de)(de)勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)沒(mei)有(you)(you)鑒證等(deng)(deng)。在一般情(qing)況(kuang)下(xia)，只要(yao)當(dang)事人(ren)(ren)采取(qu)(qu)補(bu)救措施，使合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)形式上(shang)合(he)(he)(he)(he)(he)法(fa)(fa)(fa)化后，就可以(yi)認定(ding)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)有(you)(you)效(xiao)(xiao)(xiao)。 勞(lao)(lao)(lao)動(dong)(dong)(dong)(dong)(dong)合(he)(he)(he)(he)(he)同(tong)(tong)(tong)(tong)