<p>What time do I have to get my letter in tomorrow (to the post office) for it to be considered postmarked November 15th? </p>
<p>Or can I wait for my mailman to come and take it?</p>
<p>To be safe, take it to the post office and get it post marked at the counter by 12:00 noon. There is no guarantee there will be a post mark otherwise.</p>