<p>i will have my online app sent before Jan 1. However, I need to mail other app materials, but I was wondering if the deadline was postmarked as its website didn't specify at all.</p>
<p>Thanks.</p>
<p>You may want to ask in the Duke section, but yes, generally they mean postmarked by, not sent.</p>
<p>If they need to receive it by Jan 1, however, I suggest you finish it soon and express mail IF they don't have a PO Box and indicate that they can sign it.</p>