<p>I think any of the top courier companies would be good. These would include Blue Dart and TNT as well.</p>
<p>The delivery date would depend on the kind of delivery you pay for…Regular or Express.</p>
<p>My opinion, the letters should go separately as individual envelopes to avoid any confusion and complications later and make tracking easy as well.</p>
<p>Agree with heythere. Upload all that you can. At the same time each college would have specific ask in terms of snail mail and electronic document requirement. I think for International students there is still some stuff that needs to be attested and/or verified by the school.</p>