Documents after H1

[gncsu]

Hi All, I was on student visa (OPT), and my company just told me that my H1 is approved. What all documents are they required to give me to prove my H1 status? Also, what will I need to get the stamp when I have to re-enter after leaving the country?

[shervin143]

I was on student visa (OPT), and my company just told me that my H1 is approved. What all documents are they required to give me to prove my H1 status?
>>> If it was a COS, then the approval notice with the attached I-94.

Also, what will I need to get the stamp when I have to re-enter after leaving the country?
>>> Check this
https://www.immihelp.com/h1-visa-stamping-documents/