Is there a way to know if someone has read my message on Facebook and then marked it as unread?

[Malak]

I have sent a message to a friend on facebook , and it shows that they haven't seen it yet, how can I know if they really haven't seen it or they seen it while I am offline and then used the "mark as unread" option to show that they haven't seen it and ignored my message , is there a way to know the original time the message have been seen in??

[Sarah]

I think if they read it & mark it unread it still shows up in their account as a new message but the sender will see its been read.

[pri✍]

You can't, as that's the point of Mark Untead.

[Daniel]

The Only Way is That if you Seen the Seen As Before and If The Seen as With the Time Goes Away than They Have Marked it As Unread As Once you Mark the Message as Unread the Seen As Automatically Goes Away