I agree with my colleague.
Guerra Saenz, PL--Immigration Attorneys (954) 434-5800. This answer is of a general nature and should not be relied upon as final, nor is it intended as legal advice.
I agree with the other attorneys.
IMMIGRATION LAW PROFESSOR for 10 years -- LEGAL DISCLAIMER: This answer is offered for informational purposes only. It does not constitute an attorney-client relationship.
As my colleagues have stated, you will most likely be fine with the copies that you do have. However, there are no certainties--it may all depend upon which officer in the government reviews your application. If the officer that reviews your application wants to see more documentation, he/she may issue a "Request for Evidence" (RFE) asking you for more documents. If you have any doubt, contact an experienced immigration attorney to assist you with the process. Good luck!
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You will need to prove your employment was authorized or you risk losing eligibitilyt for adjustment.
The above is intended only as general information, and does not constitute legal advice. You must speak with an attorney to discuss your individual case.