應該company的HR或者你打一份讓你的老板簽字出的那種規範的就可以,一定要有公司的letter head，such as:
date：xxx
to: xxx
Re: employment verification
this letter is to approve that xxx is employeed with xxx since xxx, his/her salalry is xxx, and his/her title is xxx.
should you have any questions, please contact me directly at xxx-xxx-xxxx.
sincerely;
xxxx
