在 file 485 之前，一共換過6個雇主，包括現在的和opt時期的。加上到期H1-B renew, 有很多的H1-B。但就是還從未到現在的sponsor 雇主這兒工作過。這是reference letter的全文：
“Please submit a list decsrbing your employment history since you last lawful admission to the United States on xxx. This list shall include the name and location of each employer, the job title(s) and duties, the educational/trainig requirments, the dates you held each position and the salary/wage paid. The list should be supported by documentary evidence which established your employment history"
我的問題是：Documentary Evicence 包括哪些文件？除了W-2， 還要所有的payroll stub 嗎？還是隻要每個雇主第一張和最後一張 payroll stub？
-It seems the IO is very picky to your case. Based on your description here, you need to provdie the H1 approval notices and copies of the I-94s, W2 forms, and ask your superviors or HR dirctors from your previous employers since your last entry to issue you a letter to indicate your job start date and end date,salary, jub titles and duties. Not need paycheck stubs.
If you have been China since you worked, you do not need to provide this kind of the information from all the previous employers and just provide it from the employer since your last entry to US.
另外，每次transfer H1-B 的時候，都是移民局一收到申請，我就去新雇主哪兒工作了（郵局的日子)，與receipts上麵的日子總是早了幾天。要不要附上郵局的記錄阿？可能找不全了。
從未給現在的sponsor 雇主工作過，會不會成為一個問題？
-Fine. Just provide the H1 approval notice to them.
是不是我這次材料齊全了，我的case 是不是就沒問題了，
-I think so.
移民局還會來第二次reference，問新的問題嗎？
多謝各位！
