1. 请问STEM OPT期间 1099 employment的雇佣关系可以算作employment吗？
2. 如果可以， 如果移民局要提供1099 employment的证明 (“evidence showing the duration of the contract period and the name and address of the contracting company" )，应该准备好什么文件来回复呢？ 比如STEM OPT学生在有一个雇主为其申请H1B时正好处于1099雇用关系期间，移民局可能要提供这段1099 employment的证明。
什么可以作为“evidence showing the duration of the contract period and the name and address of the contracting company"呢？ Employment verification letter可以吗？ 还需要其他的吗，比如1099 employment的paystubs，...?
我在https://internationalcenter.umich.edu/students/f1-students/stem-extend找到一段话(不知道现在还是否适用)：
" Types of Employment Allowed during an OPT STEM extension
...
Work for hire
This is also commonly referred to as 1099 employment, where an individual performs a service based on a contractual relationship rather than an employment relationship. The company for whom the student is providing services, must be registered with E-Verify. If requested by DHS, the student must be prepared to provide evidence showing the duration of the contract period and the name and address of the contracting company. 18 SEVP Policy Guidance 1004-03 Update to Optional Practical Training. "
谢谢！
