What are message requests?
This is about using messages on Facebook. For help with the Messenger app or messenger.com, visit the Messenger Help Center.
Message requests tell you when someone you're not friends with on Facebook has sent you a message. Learn how to check message requests.
Messages we think are spam will be filtered out of your requests. Learn more about the messages you'll get in your Chat list.
Replying to a message request connects you with the person who sent the request and lets you see any media content they sent you. The message request will then show up in your Chat list with all your other chat conversations.
Why am I shown an image or video sent to me in a message request only after I reply?
I'm blocked from using a feature on Facebook (ex: sending messages, tagging things, uploading photos).