This post office is hidden in an office building and the entrance is on 47th. When you walk in you'll need to go up to the counter and provide ID in order to get a visitor pass. Once you get the pass go up to the 4th floor and go right after stepping out of the elevator then a quick left. Walk down the long hall and it's about halfway down on the right side after the room 417. When I went there was no line and I was able to get in and out in under a minute. There are no bins here so if you're only dropping off something and don't need a receipt I would go to another location. read more