When you receive messages from non-friends through Facebook Messenger, they are moved to a Requests folder. The problem is that this folder is not really easy to find, especially after the last update from Messenger to version 4.
The recently released Messenger update is designed to simplify the experience and tell the truth mainly. But the request folder? Nah It is now practically hidden in a place that does not make any sense to anyone at any point.
The good news is that once you know it, you know. That's how you find it.
With Messenger open, and on the main page, tap the small icon for people below.
Tap there icon for other people in the upper right corner.
Why in the world thought Facebook that the folder was useful with the requirements, two menus was deeply hidden, but I can not.