What should gym owners know about immigration inquiries regarding DTV applicants?

Immigration officer called my gym

A notice for everyone. I own a gym that is popular for those looking to train Muay Thai and apply for the DTV (Tiger Eye)

For the first time since the launch of the DTV we got a call from an immigration officer at the airport (not sure which airport as my staff answered the phone)asking to confirm someone's attendance.

For context, the person in question came via an agency, an agency we stopped working with because we suspect they are forging people's bank statements after I reached out to the agency incognito as a potential client.

The person was from a former Soviet bloc country.

The staff member told the immigration officer the truth that this person hasnt come in yet and it was a short matter of fact call.