The following mail items may be deposited in a USPS Collection Box
International mail items that have the mailing label, customs declaration (including an electronic round stamp), and postage prepared and paid online through Click-N-Ship ® service on usps.com, through the eBay/PayPal integrated shipping solution, or through an authorized PC Postage® vendor Web site.
The Following 2 Users Say Thank You to slim jim For This Useful Post:
I should add that I lose 1 in 50-75 packages that I drop off out side. They just disappear into a thin air nothing like that with the ones I take inside.
Never had any problems with dropping them off in a box at any location i've ever used. I've always used printed labels though. It seems with the hand written customs forms, those items tend to get "lost" more often in my experience.