I just did mine a few months back (first time) send in the bare minimum. A letter from the company and copy of passport etc...
Within a few weeks got the approval.
A few weeks later had clearance from most countries except Malaysia, PNG and Australia. Now finally got Malaysia and PNG so will get a temp card now as I think Australia will take a long time if they will ever approve.
Anyway was very easy I must say no additional documents or questions asked.