FACEBOOK Messenger has a hidden inbox that you probably didn't know about.

It's filled with messages that may have been sitting there for years and is tucked away in an obscure section of the app.

4

The messages are from people who you're not friends with on Facebook, and are logged as "message requests".

For some reason, Mark Zuckerberg's social media behemoth doesn't send you a notification when you get one – and they don't appear in your default inbox.

Instead, they crop up in a special "message requests" folder.

If you don't know the person who's got in contact, Facebook will show you a bit of information about them to get you up to speed.

TOP STORIES IN TECH

JUICY APPLE

Is Apple plotting a huge FREEBIE? Fans speculate after company's cryptic post

GAME ON!

Gamers have hours left to claim a 'real masterpiece' title worth £35 for free

SWITCH OFF

Two beloved channels REPLACED on Sky and Virgin Media today in TV guide shake-up

SUNSATIONAL

Nasa spacecraft protected by 8ft heat shield makes closest-ever pass of the Sun

They won't know if you've seen the message until you reply, so no need to worry about looking rude if you choose not to respond.

Be careful though – once you ping them a message it'll connect your accounts so you can message one another as if you were Facebook friends.

1) How to find hidden Facebook messages on desktop

To read the messages on desktop, load up the Facebook website on a browser.

Click the Messenger icon in the top right corner of the Facebook website.

For the uninitiated, that's the little speech bubble with a lightning bolt running through it.

Hit the "options" icon (three horizontal lines) and click "message requests".

Your requests are split into two categories: People Facebook thinks you might know and suspected spam.

4

4

2) How to find hidden Facebook messages on iOs

Open up the Messenger app on your iPhone.

From here, select your profile icon at the top left of your display.

Tap Message requests.

3) How to find hidden Facebook messages on Android

Open Messenger and tap your profile photo in the top left corner. Tap Message Requests.

From Message Requests, you can: Reply to open the conversation and connect with the person.

4

We pay for your stories! Do you have a story for The Sun Online news team? Email us at [email protected] or call 0207 782 4368 . We pay for videos too. Click here to upload yours.