由于司(si)法(fa)(fa)鑒(jian)(jian)定的(de)(de)公(gong)正性(xing)質，目前市(shi)場上的(de)(de)司(si)法(fa)(fa)鑒(jian)(jian)定機(ji)構大(da)多為(wei)公(gong)檢法(fa)(fa)部(bu)門設立，建筑工程司(si)法(fa)(fa)鑒(jian)(jian)定，部(bu)分為(wei)面向社會的(de)(de)服(fu)務機(ji)構。隨著(zhu)社會進(jin)步，居(ju)民的(de)(de)維權意識逐步提高，將進(jin)一步推動司(si)法(fa)(fa)鑒(jian)(jian)定的(de)(de)社會需求的(de)(de)增長。“痕跡(ji)(ji)(ji)鑒(jian)(jian)定”，是指(zhi)運用痕跡(ji)(ji)(ji)學的(de)(de)原理和(he)技術，對有關人(ren)體(ti)、物體(ti)形成痕跡(ji)(ji)(ji)的(de)(de)同一性(xing)及分離痕跡(ji)(ji)(ji)與原整(zheng)體(ti)相關性(xing)等(deng)問題(ti)進(jin)行鑒(jian)(jian)定。鑒(jian)(jian)定結(jie)果的(de)(de)合法(fa)(fa)性(xing)，主要(yao)表現為(wei)司(si)法(fa)(fa)鑒(jian)(jian)定文(wen)書(shu)(shu)的(de)(de)合法(fa)(fa)性(xing)。鑒(jian)(jian)定文(wen)書(shu)(shu)必(bi)須具備法(fa)(fa)律規(gui)定的(de)(de)文(wen)書(shu)(shu)格式(shi)和(he)必(bi)備的(de)(de)各(ge)項內容，附近司(si)法(fa)(fa)鑒(jian)(jian)定中心，鑒(jian)(jian)定結(jie)論(lun)必(bi)須符合證據要(yao)求和(he)法(fa)(fa)律規(gui)范。

司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)(de)(de)(de)(de)期限一般簡單的(de)(de)(de)(de)(de)司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)事(shi)項應(ying)當自司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)委(wei)(wei)托書生效(xiao)之日起三十個工(gong)(gong)作(zuo)日內完成鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)。而(er)復(fu)雜(za)的(de)(de)(de)(de)(de)也應(ying)不(bu)超(chao)過六十個工(gong)(gong)作(zuo)日。但若司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)機構與委(wei)(wei)托人(ren)(ren)(ren)(ren)對鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)時限另有約(yue)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)(de)(de)(de)(de)，從其約(yue)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)。另鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)過程(cheng)中補(bu)充或者重新提取(qu)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)材(cai)料所需的(de)(de)(de)(de)(de)時間，不(bu)計入鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)時限。司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)(de)(de)(de)(de)適(shi)用條件受理司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)(de)(de)(de)(de)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)人(ren)(ren)(ren)(ren)必須是(shi)具備“兩證(zheng)(zheng)“資格的(de)(de)(de)(de)(de)司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)執業人(ren)(ren)(ren)(ren)員。司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)人(ren)(ren)(ren)(ren)實(shi)行職業資格證(zheng)(zheng)書制(zhi)(zhi)度(du)和執業證(zheng)(zheng)書制(zhi)(zhi)度(du)。在(zai)已實(shi)施司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)人(ren)(ren)(ren)(ren)職業資格制(zhi)(zhi)度(du)的(de)(de)(de)(de)(de)領域內，未(wei)取(qu)得相應(ying)司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)執業證(zheng)(zheng)書的(de)(de)(de)(de)(de)人(ren)(ren)(ren)(ren)員不(bu)得從事(shi)相應(ying)的(de)(de)(de)(de)(de)司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)活動。司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)從受理之日起一般應(ying)當在(zai)15日內出具司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)文書。如確需延(yan)(yan)長(chang)的(de)(de)(de)(de)(de)，經向委(wei)(wei)托人(ren)(ren)(ren)(ren)說明(ming)理由(you)，可(ke)延(yan)(yan)長(chang)至30日。復(fu)雜(za)、疑難(nan)案(an)件的(de)(de)(de)(de)(de)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)時限確需延(yan)(yan)長(chang)的(de)(de)(de)(de)(de)，經司(si)(si)法(fa)(fa)(fa)(fa)(fa)鑒(jian)(jian)(jian)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)機構負(fu)責(ze)人(ren)(ren)(ren)(ren)批準(zhun)，并征得委(wei)(wei)托人(ren)(ren)(ren)(ren)同意(yi)，可(ke)再(zai)適(shi)當延(yan)(yan)長(chang)。延(yan)(yan)長(chang)期不(bu)得超(chao)過60日。

司法(fa)(fa)(fa)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)在案件審理中用(yong)到的(de)(de)頻率是比較高的(de)(de)，司法(fa)(fa)(fa)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)要多少錢，因(yin)此知道司法(fa)(fa)(fa)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)的(de)(de)一般程序是比較必要的(de)(de)。大(da)家在進行(xing)司法(fa)(fa)(fa)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)時，一定(ding)(ding)(ding)要選(xuan)擇認(ren)可(ke)的(de)(de)司法(fa)(fa)(fa)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)機構。文書(shu)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)包括筆跡鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)，南京(jing)司法(fa)(fa)(fa)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)，、變造文書(shu)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)，打印(yin)、復印(yin)、印(yin)刷文書(shu)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)，文書(shu)物質(zhi)材料鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)，文書(shu)制作時間鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)。產品(pin)質(zhi)量(liang)(liang)司法(fa)(fa)(fa)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)是指依(yi)法(fa)(fa)(fa)取得(de)有(you)關產品(pin)質(zhi)量(liang)(liang)司法(fa)(fa)(fa)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)資格的(de)(de)鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)機構和鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)人(ren)受司法(fa)(fa)(fa)機關或當事人(ren)委(wei)托，依(yi)據產品(pin)質(zhi)量(liang)(liang)法(fa)(fa)(fa)律(lv)法(fa)(fa)(fa)規和有(you)關國家、部門、行(xing)業標準以及(ji)相(xiang)關科學技術(shu)知識對某一特(te)定(ding)(ding)(ding)產品(pin)的(de)(de)質(zhi)量(liang)(liang)進行(xing)檢(jian)驗、鑒(jian)(jian)(jian)(jian)別和判斷并提供鑒(jian)(jian)(jian)(jian)定(ding)(ding)(ding)結論的(de)(de)活動。