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Users are complaining about not seeing messages from since-deceased family members, people reaching out to help them, and even people contacting them to let them know their friends have died.
Back in October 2015, the social network revamped its messaging system. Previously, you had your "Inbox," and an "Other" folder where messages from people who aren't friends or friends-of-friends would end up. But it replaced this second folder with "Message Requests" - which let people you're not connected with ask to be able to talk.
But what very few people realise is there is now also a third category of messages: Filtered Message Requests. These filtered messages are what Facebook thinks is spam, and so doesn't even notify you about. They're also not easy to find.
There has been a spate of articles over the last few days explaining how to access them. Judging by the reaction on Twitter, almost no one knew it was there.
I am mortified did you know on Facebook there's a bunch of messages you haven't read in settings > people > filtered messages
- Jade ? (@JadeStamate) April 7, 2016
Just discovered a "filtered" message folder on Facebook. Oops. Sorry everyone. Literally had no idea. Should take me a few yrs to catch up.
- Max von Essen (@MaxizPad) April 6, 2016
oh my god I just discovered the filtered messages on Facebook pic.twitter.com/goQKF5mHR6
- brit brat (@Brittany_IRL) April 7, 2016
Daniel Emery
Former BBC technology journalist Daniel Emery contacted Business Insider after reading our story and checking the "filtered" folder out of curiosity.
He told us that back in February, the partner of an old college friend messaged him to tell him that his friend had died - but the message was filtered, so he only saw it today, two months later.
Emery said: "He was a friend of mine from when I was a student in Aberdeen. Used to be a good mate, obviously lost touch a few years ago, as you do."
He had thought about reaching out, but never got round to it - and then saw the message letting him know his friend had "popped his clogs."
"So its his partner - I don't quite know who she is - picking up the pieces ... it's all a bit strange really."
Emery's not the only one to have experienced something like this.
Matt Spicer, from Bristol, England said that his wife start crying after discovering the "filtered" inbox - because it contained a message sent by her cousin, who died before it was ever read.
Nice one Facebook, this hidden message thing has got my wife in tears.
She was contacted by a cousin, who has died since sending the message
- Matt Spicer (@Bristol_Pirate) April 6, 2016
Lost my passport last year and some 10/10 messaged me saying he had it and facebook hid the message from me ????
- Brittany Knight (@bwitt_xox) April 5, 2016
& now I'm in love with him and he's moved to the other side of the world so Facebook ruined my life and cock blocked me from a shit hot guy
- Brittany Knight (@bwitt_xox) April 5, 2016
Went through my Facebook filtered messages and realised there was a message from a long lost friend from like half a year ago ?????? I SORRY
- Kendra (@KendraInControl) January 19, 2016
Fuming a girl found my lost passport months ago but the message was filtered so I went n cancelled it without seeing wtf
- Meg (@meg_morg) January 27, 2016
thought i'd lost all contact forever w my japanese host family but just found a fb message from them that fb filtered out 2 YEARS ago !!!!
- merman (@merrmerrm) April 7, 2016
Are you fucking shitting me? My transgender cousin reached out during her transition & because we weren't friends facebook hid her message.
- Resting Face Palm (@bm0nies) October 30, 2015
Clearly, this hasn't been a complete success.
But what can Facebook do about this? It's a tricky one. If it errs on the side of caution, and filters more, then important messages will continue to fall through the cracks. But if it relaxes its filters, then more spam will likely get through too - and people will complain. (Facebook did not immediately respond to a request for comment.)
David Emery, who missed the message telling him of his friend's death, would like Facebook to modify its messaging feature to add a more straightforward spam folder.
"Gmail and Google, for all its flaws, has a pretty sensible system," he told Business Insider. "There is a folder for spam, you can look into it if you want, you can pull things out. It's not hidden from you and I think the issue with this is it's kind of a bit too much 'nanny state.'"
He added: "Facebook is trying to be overprotective. Overprotective comes at a cost, and things like this happening are exactly that ... hiding it is never a good thing."
If you want to check your Filtered Message Requests in the mobile app, load up Settings, then click on "People," then click on "Message Requests," then click on "See filtered requests." If you're on the desktop version of Facebook, click on the drop-down Messages tab, then on "Message Requests," then press "See filtered requests." For more detailed instructions, read this »