<p>You do not need to prove you did the internship. College application or job application is based on honor system, except for your transcript (grades). One thing to keep in mind is it is very easy to Google people’s information for verification. My kid listed track as one of her ECs, so if you were to google her name, you could see her time and meets she has attended. Adcoms are quite experienced in reading applications, so I think it wouldn’t be hard for them to figure if an applicant is stretching the truth abit. They will also call up your GC to verify some of your ECs if necessary.</p>