All the documents are checked. The question is, though, if you get a document that you think is fraudulent, whether you have the time to follow that up and check with the institution that's supposed to have issued it. I don't think any document goes unchecked.
I think to do things as thoroughly as we should, we need to give those visa officers more time. They often spend their time making sure that if they say no, they can defend it. I think there should be more time. The Auditor General says more time should be spent on checking out applications that are approved.