Beware Of Sign Pictures
One of the logical things to ask a potential real person or a scammer is Proof Of Life!
In other words to send you a photo proving they are real.
There is the down side of this:
First, if you are talking with a real person, this will show you don't trust them - this is not a good starter to a relationship
You should use all the other clues to determine if you are talking to a scammer. However, if you have doubt, but still think there is a chance that you are talking to a real person, then ask for proof.
Watch out though. Scammers are good a fraud. They can send a photo that shows a sign, but not the face.
The good news is that most scammers use stolen photos, and this means they have no way to provide a PROOF photo.
Though the really dangerous ones, are the real people scammers. These are real people, or at least have a real person to hook you. They know there is almost nothing you can do to them, so there are thousands fo real scammers around the world. They will send you all the photos you could ever want, but in the end it proved nothing - you are still being scammed.