Homeschool student sending high school diploma to colleges?

<p>I'm homeschooled outside the US, I took an exam and passed, got a high school diploma, I'm wondering do I need to inform colleges about sending the diploma or not? Should I just send it without telling them?</p>

<p>Maybe I should inform them through common app's "additional information" about sending it? Or should I email the admission office about this?</p>

<p>Which would be more appropriate? Cuase some schools require a diploma.</p>

<p>Thanks.</p>