What is a preliminary determination of ineligibility?

A preliminary determination of ineligibility is a formal notice from TSA that indicates the agency has identified a disqualifying factor or concern that may prevent the applicant from obtaining a credential.

It is usually a warning that the issue is serious enough to trigger review, and it often comes with a limited response window. This is not the same as a final decision, but it is a meaningful step in the process and should be treated with urgency.

The next step is usually to gather the necessary records, prepare a factual explanation, and submit the strongest available evidence of rehabilitation, stability, and present-day suitability. A thoughtful, complete response is much more effective than a vague appeal letter.