<p>If I did intern before, should I send the college the certificate of any proof to put it on my application??</p>
<p>You could, but I'm not sure it is necessary. I did an internship in HS and sent in a rec from my boss. But a certificate would work too if you were worried. I'd imagine it is better to send in too much than too little.</p>
<p>Don't send the certificate. If they want proof, they will ask for it. Just put it on your list of your previous work experience.</p>