Thank you for your question. The answers to some questions we receive in the OGCP mailbox depend greatly upon the circumstances of a specific study. It is often difficult to provide specific responses to general questions, such as in the scenario you describe, because many relevant details are missing (e.g., the type of study, the disease indication, the subject population, the purpose of the study, whether this eligibility verification process is mandated by the protocol, why the sponsor has instated such a process) and many other details that factor into adequately assessing the situation you mention.