How specific should I be when filling out job experience?

<p>I'm wondering how specific should I be when filling out job experience?
For example, I've been selling my works on a website for years, should I list the website's name, my username and my client's company names? So the admission office will know that I'm not making something up?
Thanks.</p>

<p>bump</p>

<p>Anyone knows?</p>

<p>bump…</p>