unpaid intern is a type of employment, thus you need work authorization such as CPT. otherwise it is illegal. 确实有人没用CPT做unpaid intern的,但是这是不合法的。如果你写在简历里, background check查出来就…… 不需要CPT/OPT的只有校内工作和volunteer work. Volunteer work要求你所担任的职 位一直是unpaid性质。一般NGO里还好说,公司里的职位很可能无法被认为是volunteer work的。