Hi,
here's a list of documents they asked the company to provide
1) detailed job duties and responsibilities, educational background required for the H1 seeker's position and why/how it matches the job requirements
2) current company activities and future projections
3) proof demonstrating company requires additional employees
4) copies of contracts indicating the work company performs and it's relation to the employee
5) job titles, duties and credentials of 5 present employees of the company
and also the lease for the location and level of business activity in the past...evidence on whythey need additional workforce etc.