So it is prob not the same for everyone.
WES confirmed they accepted digital documents from my college so just emails, from my college to them (official, portuguese transcript) and then from me to them (translation, english, same used in the application)
Reverra definetely varies a lot on what info your previous employers provide. Some did not provide my salary, as this info is included in the application, I needed to provide support documentation to back that up - it has nothing to do w/ finaid, thats a separate process. Some were startups and they asked supporting documentation that the company was for real, that I had worked there between day X and Y (there was one month difference between what I reported and what they reported)... It sounds stressful but they work together with you to understand what kind ofsupporting documentation fits each case, its really detailed things and you should work with them your own case.