所有引渡条约均规定了拒绝引渡的某些理由。一般而言,这些理由几乎是相同的,但是,并不是所有这些理由都是同样普遍适用的。一些拒绝引渡的理由基于罪犯的个人情况。引渡的主要障碍一般是国籍问题,即罪犯是被请求引渡国家的国民。在许多国家(主要是大陆法系国家),国内法,有时甚至宪法规定禁止引渡本国国民。普通法系的国家如果在其引渡条约中包含这方面的条款,一般规定可以引渡本国国民,但往往把拒绝引渡与"将案件提交 All extradition treaties provide some grounds for refusing extradition. In general, these reasons are almost the same, but not all of these reasons are equally applicable. Some grounds for refusing extradition are based on the individual circumstances of the offender. The main obstacle to extradition is generally the issue of nationality, that is, criminals are nationals of a requested extradite. In many countries (mainly continental law countries), domestic laws and sometimes constitutional provisions prohibit the extradition of their own nationals. Common law countries that include such provisions in their extradition treaties generally provide for the extradition of their own nationals, but they often refuse to extradite and submit their cases