As an immigration officer abroad, you would probably first consult your network of colleagues around you on whether or not whatever has sparked your suspicion is something they've seen within the team they work with. We've described a process whereby there's a centralized team that looks at it from a global perspective. That's another avenue that we would go to.
We have direct relationships and conversations with colleges and universities, and that could definitely be part of the verification process that an officer takes. There would be multiple ways in which somebody could flag, detect and ask questions about something they see that they don't feel is accurate or that seems off.